Enhanced stylus support and palm reject

Is it possible to add advanced palm rejection support? Not sure if it is running or not but on my computer (has an active stylus), seems I am freqently accidentally hitting menu buttons on top of the screen when writing. Again—not sure if this is me or if palm rejection is not active. It seems Kami handles palm rejection by only inking on stylus touch once a stylus is first detected. This, perhaps does not prevent palm hitting of buttons on the top or side menu though.

Also, for active stylus users, is it possible to get the eraser (other side of stylus) to function as either an actual eraser or a second tool (e.g. hilighter, or user programmable)?