A very good idea - Maybe some kind of Dryad "Elf" Necromancer who, for a fee, can suck out the memory of the skill from a body part and trap it into a skillbook for people to learn.
One obstacle is that at the moment there's no way to tell if a remain even has a skill, much less which skill it is. However, that's a problem easily solved: body parts which contain skills have blue text in the name like other magic items do.
