I have noticed some people have images for there rankings, how do u edit the ranking?

Rankings like the user text?

For example Junior Member; Member; Senior Member; ub3r?

If so, then you have to buy a Toribash-Prime here.
Then you can have pictures in your signature and a cusom text in your user title.

If you want a picture there, like I have, then you have to ask an admin to do that for you.

oh ok thnx