unfriendly third button emulation, touchpad drivers

I mainly work whit 3d application, and some of them needs the use of a third mouse button.

of course i can use the "left+right pression method" to emulate the 3th button, but I don' t consider this confortable beacause i often press one button a little bit before the other, activating right or left mouse function.

of course i can use an external mouse but I have to travel a lot 4 my work and i dislike using external mice/keyb.

my only big desire is to be able to configure the upper|pointing stick buttons whit differents function than the touchpad buttons.

waiting 4 a solution(other drivers?)

thanks.