Unique/Reserved Avatars from Stock Selection

[Dr. Bantham]

Upon a user selecting a stock avatar from those I have uploaded, I want the avatar to be exclusive to that user. The stock avatar would not be available for selection by another user, thus avoiding multiple users displaying the same avatar. Can this be done in vBulletin? I found an old hack on the vBulletin forums, but it does not seem to be compatible with the current version, as I could not find the referenced code.
http://www.vbulletin.com/forum/showthread.php?t=28497

[nexialys]

i hope this is not compatible with the actual version.. this hack was related to vb 2.x..

btw i suppose the 3.x version can be modified to work on vb 3.6+