I agree - a fresh install of your apps is the best way. Trying to backup and restore your settings to a different phone would be a debacle at best. Your dealing with Apples and Oranges (pun sort of intended)
Just a thought wouldn't rooted on old and new with Titanium backup and the same memory card with the TB images not work? I mean they are both HTC and should have close if not the same file systems and operations as far as file paths go. Not sure i don't have the mytouch to test but thought id throw it out there as far as apps go.