But there shouldn't be any references to the files in the Pose library from other poses. After V3 SR 1 everything should go straight to the !DAZ folder, bypassing the individual Inj/Rem poses. A few characters do it the wrong/old way, but it really is very few in my experience.

As has been said, for Poser 5 you must copy the !DAZ folder to the main Poser Runtimelibraries folder, and it's a good idea to do so for Poser 6.