Pck file it is one of DBPro possibilities, pck сontains all dll's for main program. For *.pak files I am use PakExplorer
http://quakestuff.telefragged.com/ but you can use zip or any other formats from PhysicsFS list.
Sync On
Res=PHYSFS ADD OBJECT PACK("res.pak",0) `Filename, Priority
PHYSFS LOAD OBJECT "objects/statue/statue.dbo",1,1,0 `Filename, Object Number, DBPro Mode, Divide Texture
PHYSFS LOAD IMAGE "textures/koshka.dds",1,1,0,0 `Filename, Image Number, Texture Flag, Divide Texture Size, Memory Flag
Position Object 1,10,15,20
DO
Sync
LOOP