I've done the obligatory search both here and elsewhere and think I'm ready to ask the question that I've had.
Now, removal of the existing tub doesn't appear to be a big deal and I'm not apprehensive about that. Disconnect everything, cover and smash. Easy and straightforward demolition, which I've done with walls, doors, floors, etc.
What I'm less confident about is the new installation and hookup.
Any resources that show how a new tub is installed, particularly if you do not have access to the underside of the tub/plumbing (2nd floor bath--- no access without breaching a wall in a living area) I'm jsut having a hard time picturing how I'd go about hooking up the new tub drain without access to the underside.