Hi,
What exactly are you using right now for your mouse input?
If you use the action: GetAxis, the multiplier is perfect to adjust the sensitivity.
add GetAxis to your state and type "Mouse X" or "Mouse Y" and adjust the multiplier value until you reach a satisfactory result.
Example, take the raycast example I sent on that other thread:
thread:
http://hutonggames.com/playmakerforum/index.php?topic=725.msg3782#msg3782package:
http://dl.dropbox.com/u/17356625/Unity/projects/misc/raycast.unitypackage1: Select the "laser" GameObject
2: Select the "rotate gun" Fsm
3: in that state, replace both GetAxis "axis name" by "Mouse X" and "Mouse Y"
4: play the scene
5: see how the mouse control now the laser
6: while playing, change the multiplier of them getAxis and see how faster or slower it gets. This is your sensitivity setting
Hope it helps,
Bye,
Jean