Default SDA Rom Update Confusion

Well, I've used the search function and cannot appear to find what I'm looking for so here goes:

I basically need somebody to write me or guide me through flashing a Tmobile SDA to the latest QTEK rom.
Mainly because I want to remove the tmobile software branding and also want Windows Media Player 10
My SDA is application and sim unlocked.

I have the rom files, NBF typhoon utilities etc and other programs i've gathered from various C500 flashing guides i've seen around.

In several threads I've seen some people say they've flashed their SDA to different roms etc, and some moaning about the joystick breaking as a special driver is needed from the tmobile rom.

If anyone could give me a hand i'd be very grateful
Am available on discussion on msn , email or simply reply to this thread with any advice you have

Many thanks!