You cannot use a game that was saved with those mods enabled without risking having problems - try a new game or one from before you installed the modifications.
S.T.A.L.K.E.R. - I think I might try to get mod working on vista soon, although I'll probably wait until I beat the game or get really tired of it. Anyone know of good ones that I should start off with?
I can - just read The Zombie Survival Guide and World War Z for ideas. Of course, I doubt that the combat will be like it is in those two books, but a game based on either one would be great if properly made.