Find all the girlie images (or all images) in the vbbs user repo on the FS or DB, and whack them. My guess would be vbbs doesn't store binary data in the DB, so you should be easily able to find the files on the filesystem. Hell, if it's half decent software it'll be a configurable option and you can just change repo directory.
15 minute process. Not pretty, but the alternative (culling all 10+ years of images through the app itself) is simply unrealistic.
If you don't want to delete all images in the vbbs user repo, get your horn dog on and browse through all the images and delete them one by one at the system level =P
Last edited by Fedaykin; 10-18-2013 at 04:17 PM..