I know this is not the direct answer to your problems but when I was using a tablet PC it sure was the solution to my problems.
The Nostromo is a keyboard shortcut device, unless you go by their marketing, which describes it as a gaming device. Regardless, what is important is that all 15 keys are programmable ( with supplied software, works with any program ) and that it is just a great device to go with tablet PCs. The form factor is designed for a hand to rest upon and digits to traverse. Ok, I am maybe making it sound better than it is but for a tablet PC with a free USB port I would not hesitate spending the 30-40$ for a customizable keypad.
There have been a couple of mentions of the Nostromo on this forum, for example:
The Best 50$ you’ll ever spend
I was using the N52 constantly but it meet its end while I had the flu and a particularly sticky milk and honey concoction made contact with the N52, instead of my mouth.
It is only because I am a creature of habit that I have not bought the newer n52te , that, and I don’t use a Tablet PC anymore.