You follow instructions, and all will be well.
only have to have the following before hand:
1) HTC drivers for your phone installed on the computer (get that by installing HTC Sync.....then you uninstall the HTC sync program w/o removing the drivers)...you can't have HTC Sync when you are doing this on your computer.
2) get the latest .net framework.
Good luck to everyone....
Here is the problems i have had which i have fixed thanks to some snazzy guys in here that helped me:
1) GPS was not working for me, but i installed the ginger bread Radio in the place of AT&T's radio....then all worked fine.