Zygote sells two pairs of maps in their photorealistic set . The upgrade provided 3 CR2's. One setup for each of the two textures and one setup for no texture. They are otherwise identical. The size is ~8 Megs as oppossed to the original ~4 Meg. The difference is Morphs. If you did not purchase the maps, you only need to keep one of the 3 Cr2's. In this case, I think Zygote somewhat over did it in their attempt to idiot proof the upgrade - especially if you are running this thing at 48 K bps instead of 2,400 K bps. But then, Zygote has to deal with a different world.