You can get the original OEM ROMs from this thread:
http://forum.ppcgeeks.com/showthread.php?t=27123
Did they tell her exactly why that cannot activate the phone? It may not have anything to do with the ROM being different.
She can get the ESN and MSID by removing the battery from the back if she can't find them on the phone itself.
Might also check this thread:
http://forum.ppcgeeks.com/showthread.php?t=83799