Sounds like what you need to do is back up your sql, delete the entire forum, run a fresh install, then unpack the sql dump again. If your forum is small you can run it all through phpmyadmin, if its large you'll need SSH access. (Repair/Optimize all the tables before backing up to prevent errors.)
As far as the images go, looks like the image paths need to be changed (go to "Styles and Templates" --> "Style Manager") in your style settings. Your image paths are pointing to images/images/etc instead of lets say images/buttons for some reason.
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