If you've got a laptop with a COMM port use Programmator. It will backup the settings and let you do the software changes EASILY. It's not a lot of money either, but finding the right cable can be troublesome.

Be careful about pushing those settings back into the system though, it can sometimes (but not too often) make working systems not work so well since it is third party software and there are several versions of each system.

On the other hand, there is software that the certified dealers have that works a LOT better.

Be careful!
Jason