First, you need a doom source port for windows, like ZDoom or PrBoom (I recommend Zdoom).
Here ya go: 
http://zdoom.org/Download

However, a source port needs the original game file. For that, just download FreeDoom, a game which has all the original data that the source port needs: http://www.nongnu.org/freedoom/index.html

After that, extract Zdoom and Freedoom into a folder, pull "RaymanDoomDemo5maps" over the application icon with your mouse and select Freedoom.
Buut here is the problem: It will look extremely unpolished and weird this way, because this version of the demo uses original Doom graphics that I not included in the file. So you will get unfitting replaced graphics from Freedoom all over the place - thats why I wanted to create a polished version for this forum, because many here don`t own the original Doom game.