[ElfMage]

Try the following changes:

First, let's change the allowed user groups to only 29.

Change the following code in the constructor:

$this->allowed_usergroups = Array(2, 5, 6, 7);

to

$this->allowed_usergroups = Array(29);

And then, change the following code in the function userExists

if (in_array($vb_userinfo['usergroupid'], $this->allowed_usergroups)) {

to the following:

$vb_usergroups = explode(",", $vb_userinfo['membergroupids']);	// make an array of membergroupids 
$vb_usergroups[] = $vb_userinfo['usergroupid'];	// add the primary usergroup to the array
foreach ( $vb_usergroups as $vb_groupiter )
	if (in_array( $vb_groupiter, $this->allowed_usergroups))
		return TRUE;

This last piece of code checks the user's 'primary' group id as well as any other member group the user may belong to (membergroupids).

Notice that I haven't run this code, so it may not work, or it may have some small syntax errors ... :-)