Do you have an ATI Radeon video card? If so, Adrian's Rojak Pot has a story up that shows you how to convert your Radeon based video card into a Fire GL card, with no physical modification through a process which modifies the video BIOS. The difference primarily between a normal Radeon video card and a Fire GL card is (drum roll.....) $120+ dollars, and enhancements designed for CAD and rendering programs. (entire list of certified programs that take advantage of Fire GL are in this PDF, including Adobe Premier) Video BIOS images are available here. Of course, modding your video card is certainly nothing new, as hacking ones BIOS can be an easy (if not somewhat dangerous) way to get more power from your investment. (Note: Although you can save a bad flash, the process is somewhat difficult. Attempt mod at your own risk.)
A while ago I posted about some guys who built a computer case out of a refrigerator the better to overclock their CPU. Those guys were wusses. REAL men use liquid nitrogen.
Wondering what to do with your :CueCat? These guys have got some answers.
What not to do to a Celeron. (Overclocked just slightly too much.)