Forum ate my last post, so I will be brief:
Go to ag_unitframes->Options->Raid->Player Groups->Group1
Rename the group to "Mysuperawsometeamofpureawsomness", in the "Player names" field enter the name of the chars that should be in the group (comma seperated if I remember correctly)
When you enter a raid you should now get a new groupframe named Mysuperawsometeamofpureawsomness with your toons in it.

Have fun.