ever try the "burn-in wizard" in SiSoft Sandra? it has benchmarks, etc that don't take long.
~Branson
*edit
United Devices is a not-for-profit organization which relies upon individual computer "donation" by downloading a small program, and running it on the individual's machine (with close to 100% sys resources being used, when system is idle)...run that program for three cycles (three sets of results) and you'll be fine.
United Devices runs a program which searches for "positive drug interaction with cancer cells, to help find a cure (or treatments for) cancer.
they also have other programs, such as smallpox vaccine development, and internet stability projects. I am participating in the Cancer Research program myself.