Hi Zachary that kind of sounds like what I've done. Created a file and am including it via plugin into forumhome. It just so happens the bit of code in that file came from album.php
Zachary and Simon I've tried using an includes plugin and then using that plugin in the FORUMHOME template, which has worked in the past for other hacks without problem, but for those others, it was always totally my own PHP, not something coined from the default files.
I think its this line that is buggering it up:
eval('print_output("' . fetch_template($templatename) . '");');
Just putting that line, all by itself, into a plugin and activating it screws up every page on the test site, which is interesting!
I'm exploring other ways to get that bit of functionality working.