I think I have located the problem..it seems to need one more line in one of the modifications:
- Open up index.php in the root folder of the forum and find:
'tpadmin' => array('TPortalAdmin.php', 'TPortalAdmin'),
'forum' => array('BoardIndex.php', 'BoardIndex'),
...then add this line right under those:
'tpmod' => array('TPmodules.php', 'TPmodules'),
I think that should do it. I will update the archive right away with this.