Whats a good program to take automatic snapshots for Windows ?

I googled and heard some good stuff about TimeSnapper. But the problem is it costs $ 40 and more importantly requires me to upgrade to .net 2.0 framework which slows down my computer. I need something that will take automatic screen snapshots every minute or so. If you dont know of any automatic tool, i would also like some suggestions for some lightwieght awesome snapshot tool.

Why do I need a screen snapshot tool ? I am trying to create a video like this