How can I apply a texture to this object?

Super cheese sandwich

I'm trying to apply "Michael 7 all maps" to "slim man tentacles". I'm looking for make the tentacles part of michael with the same skin color. I have attached a image.

 

Many thanks!

Richard Haseltine

Not easily - the UVs for Michael 7 won't match the tentacles, and may not match the skin patches in the graft. You would need to create your own maps from the Michael 7 maps with a lot of cloning and adjusting to fix the seams, and of course those maps would be for your own use only (though you could share renders).