You're really trying to push Poser beyond its current limits here. As a fellow pusher-and-breaker, I admire that.

You can parent props (and even other figures) to a body part. Getting a prop to look like a torn-up bandage is a bit harder, but textures and transmaps can work wonders. Animating it to flap around as Imhotep moves will be the real challenge.

Concerning bones, internal organs, etc.:
Visit Third Eye Function and check out both of remc's undead characters for Poser. They might give you a few ideas.