userlist modification

Hello all,

I would like to make a special userlist. I've made some modification to include more field in profile and to display it in userlist and it works, but ... I want to display not all groups in the list, only group_id 1,2,5,6 (so excluding visitors and regular members) and I don't want to let the choice of display ( removing selection groups ).

I don't really understand how the script works to fix that.

Anyone can help me ?

Thanks a lot and sorry for my english