the reason your textures are all stretched is cause you didn't edit your uvs in the texture editor.... or you didn't do it well, anyway. oh and i guess i would model the hunchback old lady just like a regular lady but with a hunchback... unless you're asking us to tell you from step one to the final step how to make a person that also happens to have a hunchback. if that's the case, download a human tutorial. follow it. then add a hunchback.