Your post left out crucial information. The name of the game.
Memory in general is noted the the Memory Article at http://www.aumha.org/articles.htm
A great consternation for some is that some applications didn't run on 1.0 G of RAM! CodeWarrior for years had a bug that required us to downsize the machine to 512M of RAM! Without the name of the game, no one can tell if the game should run on XP or has this bug.
Game I am trying to play gives message:
need 3MB to play this game
I have 1.00G of RAM
hard drive is 80G
in virtual memory window it shows 1563MB
What am I not understanding about the inability of my PC to play this game?
XP Pro 2002
CPU 2.53 GHz