Ok there seems to be two programs in the sdk for opening packages. One for linux and one for windows, both named "make_package_npdrm".
Running the following command
make_package_npdrm --informal-help
Shows the programs options:
usage: [revision 1061]
Originally posted by another user
THIS IS INFORMAL HELP. ONLY FOR INTERNAL USE! NEVER USE FOR RELEASING!
make_package_npdrm [options] config-file target-directory
-v | --verbose print verbose messages.
-f | --nofilelimit no limitation to file find.
--force-info overwrite content information files.
--weak-info no overwrite content information files.
--force-user overwrite user directory files.
--weak-user no overwrite user directory files.
make_package_npdrm [options] npdrm-package
-c | --check check package format.
-l | --list list packaged files.
-x | --extract extract package.
make_package_npdrm [options]
--version print revision.
--help print help message.
--informal-help print this message.
Its quite funny it says
"NEVER USE FOR RELEASING!"