You can rename 'Opera Stable' directory and make a copy for each profile, then run a script renaming your profile folder to 'Opera Stable', running opera then after exiting renaming the 'opera stable' back to your custom name. It works but it's kinda roughing it in.
The only reason I'm doing it is because one game I play is seriously lagging in Torch or Chrome and unplayable in FF. Opera shaves off seconds off each mouse click. As soon as the lamers developers fix the game and it doesn't lag in Torch anymore I'm not gonna look back at the Opera - solely for the lack of multiple profile capacity.