If you are gonna stick with ProPack, I highly recommend Pboost, it is quick and verstatile. I used it extensivley until I went to P5 exclusively and the multple Runtimes and nested folders made PBoost less attractive. Correct Ref by the maker of PBoost is also a godsend, makes sure all your textures are right and allows you to move your textures around. Caution, though, if you have a large textures directory (which is probable) correct Ref can take hours to run the first time... but if you keep it up to date, it flies through