1)download a rom with your vendor id ( a rom that you can flash without a goldcard).
2)extract the bigest .nbh out of it (rename the .exe to rar and extract).
3)use this to extract the .nbh
HTC WP7 NBH Dump/Rebuild:
read that thread and the .txt in the tools folder real carefully.
4)download this nodo rom.
5)extract the bigest .nbh out of it (rename the .exe to rar and extract).
6)use NBHImageTool to extract the .nbh
7)take the os.nb from the extracted nodo rom
8)replace os.nb (the os.nb from the rom that you could flash without goldcard) with the one from nodo in the extracted rom that you could flash without a goldcard.
10)then rebuild the extracted rom (the one where you copyed the os.nb from the nodo rom) using NBHImageTool .
11)copy the rebuild .nbh back in the folder where your rom was with your vendor id ( a rom that you can flash without a goldcard).
12) bring your phone in bootloader mode.
13)run ROMUpdateUtility.exe .
14) jop done