Getting back to an AT&T or Cingular Radio?

[Guest tomsull]

Hi...I was trying to fix my boot rom to let me choose to use IU mode for loading (to get the prompt when going into the firmware). In doing so, I had the Orange UK image in the same directory, but renamed to RUU...OrangeUK_S.nbf_sav and I had the nbf file to unlock the Boot ROM. Well, turns out, RUU found the Orange UK nbf and, not paying careful attention, got my AT&T phone reflashed as an Orange UK one. That was "ok", exept it also overwrote the GSM part of the ROM (and make it harder to app unlock).

I would like to just write back the GSM part of the ROM from my AT&T image. Anyone know how to do that?

Thanks...Tom