1. It doesn't matter what's currently on the unit because you will need to upgrade it to at least 2.5.2 to get locals.
2. If you've got a bash prompt then there's a good chance it has been Xtremed. It's probably a good idea to install it from scratch and then do the upgrade.
3. I'd go with Superzap's upgrade simply because it has more features and more flexibility than Kraven's Tivolator 3.1. Check page 4 of the How To's Only sticky thread in the series 1 DTivo section for my procedures to install 2.5Xtreme and Superzap's upgrade.
Please don't PM me or any other members looking for personal assistance. You'll do better by posting (after you've exhausted the search feature, of course) and taking advantage of the collective expertise of the membership instead of a single individual that may or may not be able to help you. Thank you and enjoy your stay at DDB!