Is your new resource.cfg file set to recognize both .package and .dbc files?
I think so. I downloaded it off the wiki. It says...
Priority 500
PackedFile DCCache/*.dbc
PackedFile Packages/*.package
PackedFile Packages/*/*.package
PackedFile Packages/*/*/*.package
PackedFile Packages/*/*/*/*.package
PackedFile Packages/*/*/*/*/*.package
PackedFile Mods/Packages/*.dbc
PackedFile Mods/Packages/*/*.dbc