I'll try it both ways, a full DVD version and a cut down CD version. If all of KDE and assorted programs, OO.org, graphics, development, and some language options are removed then it should fit on a CD. I'll remove as much as possible to get as much of the game on a CD. Won't be everything but plenty to still be fun. Downloading these would be horrible so I could burn a DVD and a CD (that's a as in one set, not for everybody) and mail it to whoever wants to make copies of them.
As for RAM kasperl, it's really going to need (minimal) 256Meg for 16-bit color and 512Meg for 32-bit color textures. Knoppix doesn't have the benifit of swap so it's all got to be in RAM, plus you're going to need some of it for a RAM disk for /home and for writeable game files (pilots, config files, etc.). nVIDIA drivers for hardware 3D is also something that has to be considered, as well as newer ATI drivers. Also X could end up using 100Meg after the game has been running for a while.