Michael and I where real big code moders on the Threadsdev site way back like 2003-2004 when PhotoPost Pro was first launched as a PHP program. We both used Threads before it went downhill and we jumped ship to vbulletin. I guess anywhere else I was omegatron and you may indeed be using some old hack which probally was released for what Threads 6 series or maybe even 5.
You can check out the mod corner here there are random photo blocks you can toy with you will have to adjust them to threads style formatting etc
Other than writing a Threads 7 integration module a few years back I have not peeked too much with that forum code.