Yeah… After using stock ROM for 8 months, I stated to use Windows Mobile 6.5.X custom ROM. Plan to use Android 2.2 Froyo on my HTC HD2. So flash HardSPL3 on HTC HD2. Then flash newer HTC HD2 Radio ROM with CustomRUU. No harm to try out custom Windows Mobile ROM since I have done every prerequisite. I look around lot of Windows Mobile 6.5.X custom ROM at xda-developers. And finally pick Cookie Energy ROM as my first Windows Mobile 6.5.X custom ROM to use.