[MaryTheG(r)eek]

Very helpfull topic. Could you please extend it a bit saying me how I can set a default value per bitfield (for all usergroups) ?

I've the following code in bitfield_vbmates.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<bitfields product="vbmates">
	<bitfielddefs>
		<group name="ugp">
			<group name="vbmates">
				<bitfield name="canuse" group="vbmates_permissions" phrase="vbmates_can_use">1</bitfield>
                <bitfield name="canadd" group="vbmates_permissions" phrase="vbmates_can_add">2</bitfield>
..... and others below..........
			</group>
		</group>
	</bitfielddefs>
</bitfields>

Then I setup correctly persmissions per user group. Why with the code:

if(!$permissions['vbmates'] & $vbulletin->bf_ugp['vbmates']['canadd']){
    $vbulletin->url = "vbmates.php?" . $vbulletin->session->vars['sessionurl'] ."";
    eval(print_standard_redirect('vbmates_no_add_profile', true, true));
}

a usergroup can go on while they dont have permission for it? Please note:
1.- I changed bitfield_vbmates.xml after the first product installation
2.- I've also trying to use in this file: <group name="vbmates_permissions"> but no chance.

Ok, I found it. It needed one couple of parenthesis more. Instead of:
if(!$permissions['vbmates'] & $vbulletin->bf_ugp['vbmates']['canadd'])
should be ...
if(!($permissions['vbmates'] & $vbulletin->bf_ugp['vbmates']['canadd']))