Not such a big problem
next time Giant Eagle comes on the forum he can show you the code to do this with HFS Terayon, we've already come up with this solution.
But i haven't got it on my hard drive here so i cant show you myself, sorry.
It requires you to attach a 'Diff Template' to the folder your images are hosted in from memory. He will explain it further, meanwhile, i will move this to the Terayon board.
Hang around, i'll see if i can find the code...