this is my first post here. But I assure you I love Prince of Persia (v1.0) as much as you do

My question is, how do I extract the sprites (tiles) from the SNES version of Prince of Persia 1? I can find nice PNGs with the sprites for the Prince as well as Jaffar and his guards (http://www.spriters-resource.com/snes/p ... index.html) but the other characters are missing - skeletons, girl, fat guard, the monster from level 17.
Now I'd like to know if it is possible to extract those missing sprites and if so, how would I do that? I'd especially like the girl's sprites.

Or is this not possible for some reason and thus has never been done?
Thanks in advance

empireum
edit: I should also add that I already tried opening my ROM image (US version, .SMC) in several tile editors such as Tile Layer Pro and others but every program just displayed weird garbage (but maybe I just fail to use it correctly). I'm guessing I miss the correct palette but I don't really know.