I don't think you should blow out that driver, on the contrary, doesn't the driver have specialized software to disable anymore?
Do you want it disabled ALL the time?
If so...
-I would take a piece of heavy paper or wax aper, place it on the mousepad and trace or cut with an exacto knife around the edges so you have an exact template of the touchpad (take your time to make it perfect).
-Go to the hobby store (like Hobby lobby) and get a small sheet of Acetate (around $2).
-Place the template on your acetate and use a Dremmel type tool to cut out your template. (easily purchased and returned at any Home Depot). I would also make a small slot in the edge so you can get a knife in there later should you need to take it off.
-Use spray adhesive (availavble at any office supply or hobby store) to adhere your acetate protective sheath over the touchpad. You can remove the sheath with the slot you cut in it, and clean the spray adhesive off with a product like "Goof Off" or the like.
You could also try to mask your touchpad with tape and paint on that rubberized tool coating (Home Depot). You may actually still be able to use the touchpad when you really had to (test first because the rubber may insulate all of the signals to the pad).
Lastly, I could send you a small piece of carbon fiber gaming skin which is 3 mil vinyl that easily is peeled off you could apply over the touchpad and cut with an exacto. It would probably be the most stylish and easiest to remove in the future.
I like my Wakizachi, it has a button at the top to quickly enable and disable the touchpad. [insert gratuitous product plug here]