Aaron86: Just a heads up: There's a chance the latest Circle of Eight patch will not work for you (that's what happened to me...). If that happens try an earlier version. I think it's v5.9.2 I got running.
Also, if you're using Windows Vista or 7 make sure that your ToEE folder is in your C:\ directory instead of GOG's default location in Program Files. UAC tends to mess things up.
I'm running the latest version of the Co8 mod on Win7 Pro 64 bit and haven't run into any issues with, but I know there are no guarantees . A further tip though:
run the installer as admin, and change the compatibility mode to WinXP SP3 as well as always running as admin.