Via: everquest.wikkii.com
Changing the color of group member’s “x” on map
Go to your file UI_Playername_Servername.ini.
Look for [MapViewWnd]
ShowGroup=true
GroupColor.red=0
GroupColor.green=0
GroupColor.blue=0
Change the GroupColor to any color you want. You have to pick numbers between 0 and 255. As far as I know, there is no way to change your own arrow.