The program BaUpgradeUt.exe comes with every ROM package and is the main program that controls what gets updated or written to your PDA.
If you look in your ROM update folder, you see the following files:
- ms_.nbf (this is the Main ROM)
- nk_.nbf (this is the Extended ROM)
- radio_.nbf (this is the Radio ROM)
Depending on what type of upgrade you are doing, you can have one, two or all three ROM files in your folder. The other files (numbers 4 through 7) are *all required* for the upgrade.