I bought UT2004 at CompUSA today and the price was even $39.99. I've been trying to install it and it gets to the licence agreement statement and quits. MacSoft's UT2004 support says to disconnect iSight or any USB microphone you might have. I already disconnected the headset weeks ago when I tried the demo. I just disconnected and/or powered off every USB device except for the keyboard and mouse. I even tried the original Apple mouse instead of the Logitech trackball but it doesn't like any combination of things. Any other ideas?