with a goldcard you can write any rom into it..
i used the latest unbrandet rom available.
1.) make goldcard with your sd card
2.) copy the rom rename it to: PB99IMG.zip
start with back button and power on button pressed, wait a short time and your htc will check the sd card and will start with update...
press vol. up button to say yes to update..
waiting short time... and htc is working again