No, you cant. Yes it would be really cool if in F1 2011 you can change your agent. (Not for looks, personality etc, but different agents can offer you different things like more experience and better teams)
Check out how the paddock girls behave when you are next in Paddock waiting for multiplayer.
Very flirtatious, I felt like I was Jenson for a second.
then it was ......1,2,3 and back in the room with the ironing board.