I have a very messed up installation of Gimp.

Some time ago I installed Gimpshop or Gimphoto (can't really remember which) and it installed Gimp 2.2. Didn't work for me and tried to remove it.

I've followed all Gimp remove, autoremove, clean, update and upgrade instructions I've found here to no avail. Now Software Center doesn't even show 2.8 but instead it does 2.6.

I've installed and removed Gimp from terminal nth times. Running Gimp from the dash doesn't do anything but entering "Gimp" in the terminal prompt gives me a 2.2 installation screen.

Cannot for the life of me find and remove the darn leftover garbage.

How can I completely clean my system (12.04, fully updated today) from everything Gimp so I can give 2.8 a try?

Anticipated apologies if this is a dupe but I've run through all messages with a Gimp tag and none has helped me.

sudo apt-get install -f gives me 0,0,0,0.

Thanks in advance.