What other problems are you having?
Also, to the best of my knowledge, there are 0 trackpads on the market, from any maker, that is actually pressure sensitive. They are all simple capacitive sensor that merely detect presence, not the force of said presence. Apple trackpads (at first just them, now others too) can detect multiple presences, up to (and I may have this wrong) 10 points of presence on the newest glass trackpad models (which admittedly is useless since the machine only has gestures for up to 4 fingers, and then if you use your thumb to tap-click, 5).
So, if you are having issues simply ask the question (just like you did here) and we will do our best to answer you.
I will say this much though, for drafting and design of that nature, since most of the software is on Windows, you might be best suited running that anyway, use the right tool for the job you know?