So you want to do perspective manipulations as shown on this video but you’re stuck with Windows? Now you can say thank you to Mark Probst.
Grab the latest GIMP for Windows installer. Install it (all into default locations).
I have prepared an installer of MathMap (v 1.3.4-alpha2). Grab it and install it. That’s it: start the GIMP and MathMap should be in the menu Filter -> Generic -> Mathmap. Have fun!
Note that Windows support is experimental and some functionalities may not work as they do in Linux. Also I am currently traveling and my notebook only has Ubuntu available. I produced this installer remotely and could not test it. For details, check the MathMap GoogleGroup.