Every image attachment is loaded through a permissions checker thusly:
http://www.hpcfactor.com/forums/forums/get-attachment.asp?attachmen...
if you want to display it in-line, you can copy the attachment url and then img it
[ img=/forums/forums/get-attachment.asp?attachmentid=2752]
It will display twice in the current configuration, but ultimately this isn't possible without some over complication requiring you the user to insert code. The simplest that it could be would be:
Text....
[imgAttach=1]
Text...
[imgAttach=2]
Text...
Probably a little too much for some users

So few people even use the forum markup that we do have, I think I'm the only person who has ever used lists and some of the less well known syntax!
Anyway Mr. Hawley, Staff members can upload images etc to their staff store and hot link from there using IMG.