RTF is a global modification that replaces all towns in the game.

You can remove arms and legs; I don't know much about skeletons. I would remove the hip bone and everything below it, but you need to keep Global, as it's the main one.

You can fix the Thunder Elemental by giving it animations from the Colossus and Titan.

I removed the Titan armor from the Inferno heroes in Heroes 6.