Use a projector as a laser light show

Whilst looking for something completely different I stumbled across software on a site called www.musicbeam.org, it's open source software allowing you to use any projector for a laser, pretty straight forward to use, although I had to use 32bit version for Windows as the 64bit just gave a grey screen. Will definitely be using this at future house parties to make use of my old speckled projector.