a friend wants to sell me his htc hd2 cheap, because he has put the gingerbread firmware on there which has caused the camera,gps and a few other things to stop working, i only want to put back on the original firmware and make a quick sale

is it stright forward to do this ??

The following link will give you some insight into the ins and outs of android on the hd2

http://forum.xda-developers.com/forumdisplay.php?f=928