Virtual PC on your machine

Run windows XP under VISTA Run those old apps under Vista FREE VIRTUAL MACHINE

What you'll need (Thanks Ron)

1. A Windows XP setup disc with a license.
2. The free Virtual PC 2007 download or directly from Microsoft
3. About an hour, depending on how fast your computer is.

Benchmarks? How does your installation rate?

1. Virtualization Benchmarks on PC & Macs