I just bought a new HDTV, which im using as a monitor. The max resolution of it is 1920x1080. My problem is that every game I play except for Crysis has a maximum resolution of 1600 x 1200- Which I can't use, and the next highest without widescreen is 1280 x1024. Is there anyway I can get the game resolution to 1920x 1080 in these games? They are Oblivion, Unreal Tournaament 3, MW2, Dragon Age. etc.
Well for starters you bought a HDTV, not a computer monitor. There are bound to be some problems with that.
The maximum resolution they say is 1920x1080 which means it's HD ready, it can play blu-ray disks and support console games which are 1080p. It doesn't mean it will readily support a 1920x1080 computer resolution when you plug it in, you'll have to do some configuration first.
This thread here discussed more about running a TV as a PC monitor, read the 2nd last post and try it out. It should solve your problems.