Have an HD2? Want to run both Android and Windows Phone 7 on it? We have found the video for you. The clip below contains the very, very complex and tedious rules on how to complete the dirty deed on your own.
Of course, if you kill your phone or anything else don’t come to us and complain, this is for advanced users only with time to spare and money to replace their equipment if it gets bricked. That said, have fun!
Update: there are formal text only instructions here as well if you are so inclined.