[Andreas]

The ACP doesn't use Templates at all.
If you want to introduce custom admin permissions, several steps are necessary:

1. Edit init.php array $_BITFIELD['usergroup']['adminpermissions'] to include the new permissions.
   To avoid problems with new vBulletin versions using the same bits for other permissions I suggest to use 2^31 first, then 2^30 and so on
2. In admincp/index.php wrap all custom navgroups with:
   
   PHP Code:

   if (can_administer('canadminhack1'))
{
// Navigation stuff for Hack1 here
} 

3. Edit all Hacks CP files to include
   
   PHP Code:

   if (!can_administer('canadminhack1'))
{
print_cp_no_permission();
} 

   at the top (after calling global.php)