I downloaded Geometry Wars trial and liked it so much that I bought it with MS points. How do I go about deleting the trial without deleting the purchased version? I don't really want to have the trial version eating up space on the HD. Thanks!

It's the same game. You don't have two versions of it on your hdd. When you unlock Geo Wars, all that does is enable you to unlock achievements. You actually get the whole game for every Live Arcade trial. Some developers just choose to put restrictions on them besides achievement access like they may only let you play a handful of levels or they may disable the multiplayer part of the game.

Sweet, thanks again for your help!