[cinq]

Ok just installed this but I think the instructions are not very clear.
The file edits went fine, I am refering to the last bit ( all can be done in Admincp bit )

2 things :

Firstly. for the custom no permission error, perhaps you should mention changing the phrase
gtp_cannot_read to suit your personal needs.

Secondly, for this section :

Upon completion, you must set this option to "Yes" for each USERGROUP that exists. (This will allow everyone to view contents of showthread.php.)

You must update each existing usergroup for this to take effect or they will not be able to see showthread.php

   1. Enter "USERGROUPS/USERGROUP MANAGER" found in vB Control Panel
   2. Edit each group - check YES on "Group can read content?"
   3. Update each group by pressing the UPDATE button found at the bottom.

Setting every usergroup's 'Group can read content' setting to YES basically makes everything readable ain't it ?
Perhaps you should mention, set this setting to NO if you do not want that particular usergroup access to read the content in all the forums ?

Just off the top of my head, unless I failed to understand this hack properly.