Unfortunately, this script doesn't work at all. I've given up on it now. After watching google come to my site time after time and sit at the index.php file and never go any deeper, I finally realized why. This script uses 404 errors to redirect. Google loads the archive page and thinks it's seeing a custom 404 page, so it doesn't spider any deeper (for obvious reasons). So i've removed this hack completely.
I've now installed a new hack (originally written by xenon who is awesome!!!) and you guys can view it at
http://www.battleforums.com/history (note: mine has been modified a bit... you can view an unmodified copy at
http://www.noxmedia.net/support/archive )
I'd recommend those of you who want to get spidered, give up on this hack and install xenon's. Google hasn't spidered it yet, but i'm confident they will. The reason xenon's hack works much better is because it doesn't use .htaccess (mine uses htaccess, but the original one @ noxmedia DOESNT), error redirects or even mod_rewrite. Xenon hasn't released it officially though (I don't think) and I don't think he wants to and I know for sure he isn't offering tech support on it... so the scripts are pretty much untested and in beta, but for those of you who want it, you can PM xenon and ask nicely.
It's too bad it took me two months to figure out that overgrow's hack didn't work. For those reading this, hopefully it will save you the time wasted of installing this script and you can go straight to another hack. There are several others out there as well that do work. If you don't want to install an archive, then try FastForward's hack or Filburts recentely released hack (@ vbulletin.com).
SKuZZy