@Taledron, This, sir, is the definitive guide to flashing Android onto HTC HD2 phones. It is well written, concise, and explains everything in brilliant detail. My hat's off to you.
When I flashed my HD2, I didn't know this guide existed. The guide that I used was similar, though. The only advice that I can give to ANYONE reading this guide with the intent of flashing their HD2 to Android is to read the ENTIRE guide BEFORE you start, and make sure that you have all files downloaded to a single folder on your desktop where you can find them easily. Be patient. When flashing the radio and HSPL, my phone moved quickly, then lagged for a bit at 96%. This should be considered normal. Take your time, and make sure you're not skipping anything. I am a repair tech, and I have on several occasions taken in HD2's that are bricked and not-repairable because of people trying to flash to Android, and using the wrong radio, etc. There's normally no returning from this.