diff --git a/apk/vmmgr b/apk/vmmgr
index 539a616..7794ada 160000
--- a/apk/vmmgr
+++ b/apk/vmmgr
@@ -1 +1 @@
-Subproject commit 539a61662de6278f7841c7e9b86d9d17d5e5b492
+Subproject commit 7794ada45e02d5f5ee698765ddb1a1bb6154bee2
diff --git a/lxc-apps/ckan/install.sh b/lxc-apps/ckan/install.sh
index d831e6d..ce620bc 100755
--- a/lxc-apps/ckan/install.sh
+++ b/lxc-apps/ckan/install.sh
@@ -26,7 +26,7 @@ service lxc-ckan-redis start
 
 # Configure Solr
 mkdir -p /srv/ckan/solr_data
-lxc-execute ckan-solr -- cat /opt/solr/server/solr/solr.xml >/srv/ckan/solr_data/solr.xml
+lxchelper extract ckan-solr /opt/solr/server/solr/solr.xml /srv/ckan/solr_data/solr.xml
 chown -R 108983:108983 /srv/ckan/solr_data
 service lxc-ckan-solr start
 
diff --git a/lxc-apps/crisiscleanup/install.sh b/lxc-apps/crisiscleanup/install.sh
index 4419f82..c94929d 100755
--- a/lxc-apps/crisiscleanup/install.sh
+++ b/lxc-apps/crisiscleanup/install.sh
@@ -17,9 +17,7 @@ service lxc-crisiscleanup-postgres start
 envsubst <createdb.sql | lxc-attach -u 5432 -g 5432 crisiscleanup-postgres -- psql
 
 # Copy existing config files into persistent storage
-mkdir -p /srv/crisiscleanup/cc_conf
-chown 108080:108080 /srv/crisiscleanup/cc_conf
-lxc-execute crisiscleanup -- tar -cC /srv/crisiscleanup/config . | tar -xC /srv/crisiscleanup/cc_conf
+lxchelper extract crisiscleanup /srv/crisiscleanup/config /srv/crisiscleanup/cc_conf
 
 # Configure CrisisCleanup
 export CRISISCLEANUP_ADMIN_USER="Admin"
diff --git a/lxc-apps/cts/install.sh b/lxc-apps/cts/install.sh
index 5288435..07e9ec9 100755
--- a/lxc-apps/cts/install.sh
+++ b/lxc-apps/cts/install.sh
@@ -17,9 +17,7 @@ service lxc-cts-postgres start
 envsubst <createdb.sql | lxc-attach -u 5432 -g 5432 cts-postgres -- psql
 
 # Copy existing config files into persistent storage
-mkdir -p /srv/cts/cts_conf
-chown 108080:108080 /srv/cts/cts_conf
-lxc-execute cts -- tar -cC /srv/cts/cts/settings . | tar -xC /srv/cts/cts_conf
+lxchelper extract cts /srv/cts/cts/settings /srv/cts/cts_conf
 
 # Configure CTS
 export CTS_SECRET=$(head -c 26 /dev/urandom | base64 | tr -d '+/=')
diff --git a/lxc-apps/decidim/install.sh b/lxc-apps/decidim/install.sh
index 21fb1dc..79e5ddb 100755
--- a/lxc-apps/decidim/install.sh
+++ b/lxc-apps/decidim/install.sh
@@ -17,9 +17,7 @@ service lxc-decidim-postgres start
 envsubst <createdb.sql | lxc-attach -u 5432 -g 5432 decidim-postgres -- psql
 
 # Copy existing config files into persistent storage
-mkdir -p /srv/decidim/decidim_conf
-chown 108080:108080 /srv/decidim/decidim_conf
-lxc-execute decidim -- tar -cC /srv/decidim-app/config . | tar -xC /srv/decidim/decidim_conf
+lxchelper extract decidim /srv/decidim-app/config /srv/decidim/decidim_conf
 
 # Configure Decidim
 export DECIDIM_SECRET=$(lxc-execute decidim -- rake secret)
diff --git a/lxc-apps/openmapkit/install.sh b/lxc-apps/openmapkit/install.sh
index 27c9406..a384c0d 100755
--- a/lxc-apps/openmapkit/install.sh
+++ b/lxc-apps/openmapkit/install.sh
@@ -4,10 +4,12 @@ set -ev
 # Configure OpenMapKit
 export OPENMAPKIT_ADMIN_USER="admin"
 export OPENMAPKIT_ADMIN_PWD=$(head -c 12 /dev/urandom | base64 | tr -d '+/=')
-mkdir -p /srv/openmapkit/omk_conf /srv/openmapkit/omk_data
-chown -R 108080:108080 /srv/openmapkit/omk_conf /srv/openmapkit/omk_data
-lxc-execute openmapkit -- tar -cC /srv/openmapkit/data . | tar -xC /srv/openmapkit/omk_data
+mkdir -p /srv/openmapkit/omk_conf
+chown -R 108080:108080 /srv/openmapkit/omk_conf
 envsubst <omk_conf/settings.js >/srv/openmapkit/omk_conf/settings.js
 
+# Copy existing files into persistent storage
+lxchelper extract openmapkit /srv/openmapkit/data /srv/openmapkit/omk_data
+
 # Register application
 vmmgr register-app openmapkit omk "${OPENMAPKIT_ADMIN_USER}" "${OPENMAPKIT_ADMIN_PWD}"
diff --git a/lxc-apps/pandora/install.sh b/lxc-apps/pandora/install.sh
index b27dc9c..680a0e1 100755
--- a/lxc-apps/pandora/install.sh
+++ b/lxc-apps/pandora/install.sh
@@ -30,12 +30,7 @@ lxc-attach pandora-rabbitmq -- rabbitmqctl set_permissions -p /pandora pandora "
 # Configure Pandora
 mkdir -p /srv/pandora/pandora_conf /srv/pandora/pandora_data
 chown 108080:108080 /srv/pandora/pandora_data
-# Copy customized configuration if VANILLA environment variable is not set, else use the default pandora config
-if [ ${VANILLA:-0} -eq 0 ]; then
-    cp pandora_conf/config.jsonc /srv/pandora/pandora_conf/config.jsonc
-else
-    lxc-execute pandora -- cat /srv/pandora/pandora/config.pandora.jsonc >/srv/pandora/pandora_conf/config.jsonc
-fi
+cp pandora_conf/config.jsonc /srv/pandora/pandora_conf/config.jsonc
 cp pandora_conf/gunicorn_config.py /srv/pandora/pandora_conf/gunicorn_config.py
 envsubst <pandora_conf/local_settings.py >/srv/pandora/pandora_conf/local_settings.py
 chown -R 108080:108080 /srv/pandora/pandora_conf
diff --git a/lxc-apps/sahana-demo/install.sh b/lxc-apps/sahana-demo/install.sh
index 7329cf0..fc53d9e 100755
--- a/lxc-apps/sahana-demo/install.sh
+++ b/lxc-apps/sahana-demo/install.sh
@@ -17,10 +17,10 @@ service lxc-sahana-demo-postgres start
 envsubst <createdb.sql | lxc-attach -u 5432 -g 5432 sahana-demo-postgres -- psql
 
 # Prepare persistent directory structure
-mkdir -p /srv/sahana-demo/sahana_conf /srv/sahana-demo/sahana_data/databases /srv/sahana-demo/sahana_data/uploads /srv/sahana-demo/sahana_data/default
-chown -R 108080:108080 /srv/sahana-demo/sahana_conf /srv/sahana-demo/sahana_data
-lxc-execute sahana-demo -- tar -cC /srv/web2py/applications/eden/models . | tar -xC /srv/sahana-demo/sahana_conf
-lxc-execute sahana-demo -- tar -cC /srv/web2py/applications/eden/modules/templates/default . | tar -xC /srv/sahana-demo/sahana_data/default
+mkdir -p /srv/sahana-demo/sahana_data/databases /srv/sahana-demo/sahana_data/uploads
+chown -R 108080:108080 /srv/sahana-demo/sahana_data
+lxchelper extract sahana-demo /srv/web2py/applications/eden/models /srv/sahana-demo/sahana_conf
+lxchelper extract sahana-demo /srv/web2py/applications/eden/modules/templates/default /srv/sahana-demo/sahana_data/default
 
 # Configure Sahana
 export SAHANADEMO_HMAC=$(head -c 18 /dev/urandom | base64 | tr -d '+/=')
diff --git a/lxc-apps/sahana/install.sh b/lxc-apps/sahana/install.sh
index c559d24..1d8a28c 100755
--- a/lxc-apps/sahana/install.sh
+++ b/lxc-apps/sahana/install.sh
@@ -17,9 +17,9 @@ service lxc-sahana-postgres start
 envsubst <createdb.sql | lxc-attach -u 5432 -g 5432 sahana-postgres -- psql
 
 # Prepare persistent directory structure
-mkdir -p /srv/sahana/sahana_conf /srv/sahana/sahana_data/databases /srv/sahana/sahana_data/uploads
-chown -R 108080:108080 /srv/sahana/sahana_conf /srv/sahana/sahana_data
-lxc-execute sahana -- tar -cC /srv/web2py/applications/eden/models . | tar -xC /srv/sahana/sahana_conf
+mkdir -p /srv/sahana/sahana_data/databases /srv/sahana/sahana_data/uploads
+chown -R 108080:108080 /srv/sahana/sahana_data
+lxchelper extract sahana /srv/web2py/applications/eden/models /srv/sahana/sahana_conf
 
 # Copy Spotter template
 cp -r sahana_data/Spotter /srv/sahana/sahana_data/
diff --git a/lxc-apps/sambro/install.sh b/lxc-apps/sambro/install.sh
index 211a4b0..4b3e111 100755
--- a/lxc-apps/sambro/install.sh
+++ b/lxc-apps/sambro/install.sh
@@ -17,10 +17,10 @@ service lxc-sambro-postgres start
 envsubst <createdb.sql | lxc-attach -u 5432 -g 5432 sambro-postgres -- psql
 
 # Prepare persistent directory structure
-mkdir -p /srv/sambro/sahana_conf /srv/sambro/sahana_data/databases /srv/sambro/sahana_data/uploads /srv/sambro/sahana_data/SAMBRO
-chown -R 108080:108080 /srv/sambro/sahana_conf /srv/sambro/sahana_data
-lxc-execute sambro -- tar -cC /srv/web2py/applications/eden/models . | tar -xC /srv/sambro/sahana_conf
-lxc-execute sambro -- tar -cC /srv/web2py/applications/eden/modules/templates/SAMBRO . | tar -xC /srv/sambro/sahana_data/SAMBRO
+mkdir -p /srv/sambro/sahana_data/databases /srv/sambro/sahana_data/uploads
+chown -R 108080:108080 /srv/sambro/sahana_data
+lxchelper extract sambro /srv/web2py/applications/eden/models /srv/sambro/sahana_conf
+lxchelper extract sambro /srv/web2py/applications/eden/modules/templates/SAMBRO /srv/sambro/sahana_data/SAMBRO
 
 # Configure SAMBRO
 export SAMBRO_HMAC=$(head -c 18 /dev/urandom | base64 | tr -d '+/=')
diff --git a/lxc-apps/seeddms/install.sh b/lxc-apps/seeddms/install.sh
index 3a6622a..2b7dc7b 100755
--- a/lxc-apps/seeddms/install.sh
+++ b/lxc-apps/seeddms/install.sh
@@ -19,11 +19,8 @@ lxc-execute seeddms -- cat /srv/seeddms/create_tables-postgres.sql | lxc-attach
 cat custom.sql | lxc-attach -u 5432 -g 5432 seeddms-postgres -- psql seeddms
 
 # Copy existing files into persistent storage
-mkdir -p /srv/seeddms/seeddms_conf /srv/seeddms/seeddms)data
-chown 108080:108080 /srv/seeddms/conf
-chown 108080:108080 /srv/seeddms/data
-lxc-execute seeddms -- tar -cC /srv/seeddms/conf . | tar -xC /srv/seeddms/seeddms_conf
-lxc-execute seeddms -- tar -cC /srv/seeddms/data . | tar -xC /srv/seeddms/seeddms_data
+lxchelper extract seeddms /srv/seeddms/conf /srv/seeddms/seeddms_conf
+lxchelper extract seeddms /srv/seeddms/data /srv/seeddms/seeddms_data
 
 # Configure SeedDMS
 envsubst <seeddms_conf/settings.xml >/srv/seeddms/seeddms_conf/settings.xml
diff --git a/lxc-apps/sigmah/install.sh b/lxc-apps/sigmah/install.sh
index ac0b029..396d3fc 100755
--- a/lxc-apps/sigmah/install.sh
+++ b/lxc-apps/sigmah/install.sh
@@ -22,26 +22,24 @@ chown -R 108080:108080 /srv/sigmah/sigmah_data
 envsubst <sigmah_conf/persistence.xml >/srv/sigmah/sigmah_conf/persistence.xml
 cp sigmah_conf/sigmah.properties /srv/sigmah/sigmah_conf/sigmah.properties
 chown -R 108080:108080 /srv/sigmah/sigmah_conf
-lxc-execute sigmah -- cat /srv/tomcat/webapps/sigmah/sigmah/images/header/org-default-logo.png >/srv/sigmah/sigmah_data/files/logo.png
+lxchelper extract sigmah /srv/tomcat/webapps/sigmah/sigmah/images/header/org-default-logo.png /srv/sigmah/sigmah_data/files/logo.png
 
 # Populate database
-lxc-execute sigmah -- cat /srv/sigmah-MinimumDataKit.sql >/tmp/sigmah-MinimumDataKit.sql
-lxc-execute sigmah -- cat /srv/sigmah-newOrganizationLaunchScript.sql >/tmp/sigmah-newOrganizationLaunchScript.sql
 export SIGMAH_ADMIN_USER=Admin
 export SIGMAH_ADMIN_EMAIL=admin@example.com
 export SIGMAH_ADMIN_PWD=$(head -c 12 /dev/urandom | base64 | tr -d '+/=')
 export SIGMAH_ADMIN_HASH=$(python3 -c "import bcrypt; print(bcrypt.hashpw('${SIGMAH_ADMIN_PWD}'.encode(), bcrypt.gensalt(prefix=b'2a')).decode())")
-sed -i "s|§OrganizationName§|Demo organization|g" /tmp/sigmah-newOrganizationLaunchScript.sql
-sed -i "s|§OrganizationLogoFilename§|logo.png|g" /tmp/sigmah-newOrganizationLaunchScript.sql
-sed -i "s|§HeadquartersCountryCode§|CZ|g" /tmp/sigmah-newOrganizationLaunchScript.sql
-sed -i "s|§UserEmail§|${SIGMAH_ADMIN_EMAIL}|g" /tmp/sigmah-newOrganizationLaunchScript.sql
-sed -i "s|§UserName§|${SIGMAH_ADMIN_USER}|g" /tmp/sigmah-newOrganizationLaunchScript.sql
-sed -i "s|§UserFirstName§|${SIGMAH_ADMIN_USER}|g" /tmp/sigmah-newOrganizationLaunchScript.sql
-sed -i "s|§UserLocale§|en|g" /tmp/sigmah-newOrganizationLaunchScript.sql
-sed -i "s|\$2a\$10\$pMcTA1p9fefR8U9NoOPei.H0eq/TbbdSF27M0tn9iDWBrA4JHeCDC|${SIGMAH_ADMIN_HASH}|" /tmp/sigmah-newOrganizationLaunchScript.sql
-cat /tmp/sigmah-MinimumDataKit.sql | lxc-attach sigmah-postgres -- sh -c "PGPASSWORD=${SIGMAH_PWD} psql -U sigmah sigmah"
-cat /tmp/sigmah-newOrganizationLaunchScript.sql | lxc-attach sigmah-postgres -- sh -c "PGPASSWORD=${SIGMAH_PWD} psql -U sigmah sigmah"
-rm -f /tmp/sigmah-MinimumDataKit.sql /tmp/sigmah-newOrganizationLaunchScript.sql
+lxc-execute sigmah -- cat /srv/sigmah-MinimumDataKit.sql | lxc-attach sigmah-postgres -- sh -c "PGPASSWORD=${SIGMAH_PWD} psql -U sigmah sigmah"
+lxc-execute sigmah -- cat /srv/sigmah-newOrganizationLaunchScript.sql | \
+    sed -e "s|§OrganizationName§|Demo organization|g" \
+        -e "s|§OrganizationLogoFilename§|logo.png|g" \
+        -e "s|§HeadquartersCountryCode§|CZ|g" \
+        -e "s|§UserEmail§|${SIGMAH_ADMIN_EMAIL}|g" \
+        -e "s|§UserName§|${SIGMAH_ADMIN_USER}|g" \
+        -e "s|§UserFirstName§|${SIGMAH_ADMIN_USER}|g" \
+        -e "s|§UserLocale§|en|g" \
+        -e "s|\$2a\$10\$pMcTA1p9fefR8U9NoOPei.H0eq/TbbdSF27M0tn9iDWBrA4JHeCDC|${SIGMAH_ADMIN_HASH}|" \
+    | lxc-attach sigmah-postgres -- sh -c "PGPASSWORD=${SIGMAH_PWD} psql -U sigmah sigmah"
 
 # Install config update script
 cp update-conf.sh /srv/sigmah/update-conf.sh
@@ -51,5 +49,3 @@ service lxc-sigmah-postgres stop
 
 # Register application
 vmmgr register-app sigmah sigmah "${SIGMAH_ADMIN_EMAIL}" "${SIGMAH_ADMIN_PWD}"
-
-# TODO: SQL skripty jako soucast installu?