THE BEST METHOD to run PSX games (and everything else for that matter) is via Retroarch - http://buildbot.libretro.com/nightly/
If you have any questions on how to set it up on Windows please feel free to ask, its very easy.
Galaga Legios DX is free for PS+ tomorrowdecent shooter...I had it a while back on the 360.
Oh and is Sprung playing New Vegas?
Are we in for another round of "geez the PS3 version is super glitchy"![]()