[Carnage]

probably somethign for modifications requests but anyway; heres a starter:

[sql]
SELECT username FROM user WHERE $groupid IN(membergroupids) OR usergroupid = $groupid
[/sql]

should do it... that will select all members of a certain group and give you the names, obvioulsy you still need to output them.

Alternativly one way i can think of doing it is by setting all groups to display on showgroups.php then somewhere in the code check that $groupid = $usergroup thats being displayed.

Without the code at hand i can't give more than vague pointers atm