I just completed this successfully - as always had to piece it together.
Create a temp directory to house the export:
mkdir migration
Copy the archive to this directory (myarchive.tgz in my example)
Extract the archive:
tar -xvzf myarchive.tgz
Modify the files from the archive:
configuration - change line:
RegistryKeys FWManagement,Firewall,Primary
to
RegistryKeys FWManagement,Primary (remove firewall)
configuration2
:is_firewall_module (yes)
to
:is_firewall_module (no)
:installed_products_registry_string ("FWManagement,Firewall,Primary")
to
:installed_products_registry_string ("FWManagement,Primary")
tar up the archive:
tar -cvzPf mynewarchive.tgz *
This allowed me to import the configuration. I was then able to go in and deselect firewall module and install database on the newly imported management station.
Hope this helps!!!