Hi af01waco, welcome to the PCHF...sorry for the delay in response to this.

This method can be used for all games, STALKER is just the example.
If it doesn't work for you, just ensure all drivers and game patches are up to date...MoH:AA isn't a very resource hungry game...so if you're having trouble running it, there may be another problem somewhere.

I'm not a VISTA user, just bought a New Machine in XP

But I do believe there is a Compatability Mode which allows you to mimic XP, so the game starts

Is this only for 4gb of ram or less? I have 2gb, would it do anything for me?

EDIT: I just went through everything and the App can handle 2gb box was already checked.