You can try using Mitsubishis optimized .exe for UrT, unlike of what most people think it's not just Ikalizer sound improvement it's more of a patch that has helped a lot of people. It cab repair some common errors relating FPS lag but also helps with problems that require a higher level of knowledge (higher level of knowledge means-we dont shit about it). Also it fixes minor glitches such as short lag when someone enters the game (which is something that happened to me a lot of times).
http://forums.urbanterror.net/topic/189 ... -ikalizer/