targeting hotkeys

I was wondering if theres a key that when used targets the nearest enemy.
and if not if its possible to make a keybinding on the keyboard so you can cycle or target the nearest enemy.
I was in party today and it is a disaster to use an ps3 gamepad + keyboard and then need a 3th hand using my mouse to target mobs , next to needing 5 fingers for all 10 actions :P
With the gamepad it automaticaly targets the nearest friendly unit.
it's messy and have realy a hard time targeting anything when there are 4 or 5 mobs onto the party.. you can hardly target anything correct at all and still even with mouse i target 50% of the time the player instead of the enemy lol

You can customize the settings, but for me the F9/10/11/12 buttons will do various 'closest to you' targetting. I forget which is which, but one will target the nearest PC, one the nearest NPC, one the nearest enemy, and maybe something else.

Note: It still only targets nearest stuff in the direction you're facing.