If you regularly run multiple programs on your Windows XP PC, then VistSwitcher is an Alt+Tab replacement well worth checking out. It replaces the standard Alt+Tab with something that is not only more attractive, but a lot more functional as it actually shows the whole screen before you switch to it. For me, this works great when I’m connected to multiple computers through UVNC and each one is doing an update or some other time consuming task. I can check the status of each without digging through the multiple windows.
The program is well under 1mb, and well worth your time to check out.