Hey, first post here. I installed [sic] a copy of ultimate doom and it runs pretty slow. I am on an iMac g5 w/ 256MB ram. Should be fine I assume, but there is obviously something I am missing. What happens: starts up fine, but the framerate is about 2fps or something. There is a little box in the top-left of the screen that is smooth as something that is really smooth. So a small part of the screen is fine for some reason. Any ideas? I do so very much want to relive the old-school. Cheers.