ok i am sorry i should read better.
The only easy way i can think about this is to do this:
1) create an extra field in profile. This is already avaliable as an option. Now, my understanding is you have something like this as a setup:
Code:
POSTS 1-100 100-250 250-500
Star Wars Jedi Dark Jedi Luke
Star Trek ensen captain admiral
if so, what i would do is set that field as a directory. So, for example they could enter Star_Wars or Star_Trek (in the description type the list).
Then modify stars.php do call image but also to use the variable from the user so it would be:
<img src="path_to_images/$user[new_field]/post_number.gif">
sort of thing.
That would work and not require much hacking at all.