There are three variables in the script now:
$max=?? - This number decides how many users to display
$userx=?? - Users to exclude from top referrer
$userl=?? - Users to exclude from top referrer list
On my board I have the admin [userid1] (me

) on the list but not on the top referrer for the board. It may look silly, but any admin worth his salt is going to have more referrals than his users I should think. If you dont like this you can set both userx and userl to 0 and it will list all.
Otherwise any userids you list will be excluded.