[kippesp]

The script must be located in the admin directory (i.e. the same spot as config.php and all the other admin files). There must be a directory for the script to read/write files from/to named 'templates' (or whatever is entered in the form). On a Unix file system server, that directory must have writable permission by the webserver (a chmod 777 does the trick).

So basic file structure is this:
forums/admin/config.php
forums/admin/tbs.php
forums/admin/templates/[templates stored here]

And I know this is a rather long thread. But when the original author does not support his/her hack, you really should read the entire thread (a good idea anyway). This has been posted before and discussed as well.