[E]

if u want the button on forum homepage...
open up root/index.php

and find

PHP Code:

//check usergroup of user to see if they can use PMs 


Above add

PHP Code:

//Show application button
if ($bbuserinfo[usergroupid!=0) {
$button=" ";
} else {
$button="<a href=\"application.url\"><img src=\"button.url\"></a>;
} 


now open up forumhome template.. and add $button wherever u want it too show