Compressing it would indeed be very helpful. With it, you can turn 12 GB's worth of a game and still have it on one DVD-R disk but would play like a 12 GB game. My 2D game has about 14 MB's worth in files but compresses to about 5 MB (estimated) making for a faster download and faster installation. The idea of compressing your game should be looked into. Molebox already does this (and encrypts it as well).