I've been trying to find a Mac CD for Doom 3 RoE, but everywhere I've looked there isn't one. Is the CD universal for Mac and PC? I borrowed an RoE PC CD from a friend trying to see if it would work before I bought it, and I'm wondering if I just need to copy some files to a certain location for it to work; like a mod. I need more DooM to play. Thanks for any help.