So being on CyanogenMod-6.1.2-Droid (Froyo 2.2.1) and having a stock nandroid backup of the Alltel Milestone/Droid stock 2.1.1 Eclair will work? I've been hearing so many things about flashing back to 2.1.1 from 2.2.1 being bad because it will brick your phone.
Currently I have:
Model number: Droid
Android version: 2.2.1
Baseband version: C_01.07.00R
Kernel: 188.8.131.52-cm-stkmtwebster@eng-laptop #1
Mod version: CyanogenMod-6-1-2-Droid
Build version: FRG83D
as for flashing someone elses backup despite being the same device will not work the best as their device is configured differently most likely.
But wouldn't making a backup of their current apps and settings, wiping their phone, reinstalling a program to back up the stock (untouched but rooted) rom and then restoring their backup work? Because then, while their phone is in a clean state, I won't be copying any of their personal data. I'm just making a guess here.
I'm not doubting at all what you're saying. I just want to make sure I do the right and best thing to go back to stock.