How do I restore the default dock graphic?

A while back I downloaded a program called Dock Doctor in order to mess with my dock graphics.

Unfortunately it, never really worked right, so I decided to remove it. When I removed it, my dock kept the last setting it had from when Dock Doctor was installed, and I am unable to get it back to the default.

I have tried everything I can think of. I deleted the files from the library > preferences which deal with the dock, and that didn't help.

I then tried to install both cleardock, which wouldn't install (gives me an error), and cleardock, who's settings don't seem to be changing my dock at all. Something dock doctor did seems to have completely locked my dock graphics down and nothing I do seems to be able to fix it.

Someone please help with any suggestions on getting my dock back to the default, I'm out of ideas.