Image Blocks in LiveJournal?

I'm trying to think of a way to integrate an image block into a LiveJournal layout.. This would be easy if LJ didn't strip embedded files and iframes from it's styles when displaying pages.. :/

It doesn't strip images and CSS and tables and so-on though.. Which got me thinking...

Is there some way to get one of the graphics toolkits to take a little "screen capture" like thing of my 'featured-photos.php' file of imageblocks, and routinely save it as a .jpg to the server? Then to visitors it would look just like an image-block, but it would link back to the gallery's root?

I don't know if anyone's tried this already..? How hard would it be? Thanks in advance!