OpenPhotoBooth is open-source photobooth.
There are packages available for Windows systems. These have been tested on Windows XP and have been reported as working on Vista. If you try them and they work for you, please take a moment to let me know.
There is a short How-To available online, at https://github.com/jmhobbs/OpenPhotoBooth/wiki/How-To.
If you have any tips or bugs, please share them and we will incorporate them into the document.
Source is available through git. Patches are most welcome.