good free solution 4 simultaneous tripleboot of xp, 7, ubuntu?

[pianoplayer88key]

ok first by free I don't mean get those OS's for free - I have them all legally - xp home was purchased, 7 beta downloaded, ubuntu is free anyway. by free i mean I don't have to purchase ($0.005 or more) software or hardware to do it..

basically i have all 3 OS's installed on my machine, but I have to shut down one before I go into another. I'd like to be able to run all 3 concurrently, without sacrificing performance (relative to just booting it by itself normally) in whichever one i happen to have "active".

Is there any way to do this? My bro mentioned vmware (player) but said the other day it sucks for gaming.
Since I only have 2GB physical RAM, often exceed that in XP (thanks to having 100s or 1000s of tabs open in firefox routinely - once recently my swap file was increased to like 5GB), is there some way I could like hibernate one OS (save everything in RAM & swap to a designated portion of the hard drive), then load another (from hibernation) without having to reset / POST / autoexec.bat (or other equivalents - ok so maybe i'm showing my age (i was born the same year the original IBM PC came out and remember our first ms-dos computer bought in 1988) etc? I wouldn't expect it to be as fast as switching users in xp, although that'd be nice