Hmmm, I see. Yes there would be alot of problems, since 9 and 10 are completely different versions. But that leaves me with a question. Since 9 and 10 are completely different, will there be a big difference in the Vista and XP versions of 3DGS? Also, will creators of the Vista version be able to play their games on XP? we really need the insight of a conitec member.