The main reason so many recommend shelving the original drive is because a) it's a known good, working image, and b) you'll always have a spare drive available in case your hacked drive goes bad. As long as you've made a backup of the original and have tested it to make sure it works, I see no reason not to put the original drive back into service in your HDTivo. Just make sure you archive the image and keep it in a safe place.
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!