o2 Extended Rom 1.60.50 Update Problems

[russdaplaya]

Hi everyone I've had an XDA2 since Friday and have recently tried to upload a custom extended rom which I made from the original ms_.nbf provided on the o2 website. I have used er2003edit to edit the original rom and then used the provided HimaUpgradeUt.exe (0.9.1.0) to upload the rom. The rom uploads to 100% waits about 15 seconds and then just dissapears from my computer screen and the XDA2 is left blank. I then reset the XDA2 and am stuck in boot mode.

Does any one know if what I am trying to do is impossible, or if I am doing something wrong?
Any help would be appreciated.

Regards, Russ

[russdaplaya]

I have since been able to use my custom Extended Rom with modified cabs by using HimaUpgradeUt.exe to flash the Nk.nbf, ms_.nbf and Radio.nbf in one process.
So it appears that you cannot flash extended rom on its own? Surely you dont have to flash all roms just to get your custom ms_.nbf rom to work?