Found this:
http://www.pocketpctweaks.com/pocket...pping_Pressure
For the 6700, the key is
HKLM/Software/Drivers/Touch/PressureThreshold
The value in mine was 8197. Doing a screen calibration resets this to a number in the ballpark of that (and is one way to recover if you change it and your screen is unresponsive - navigate to settings/system/screen/recalibrate using the dpad and buttons, and then you can recalibrate - phew!
Anyway, on my 6700 smaller numbers seem more sensitive then larger ones - I set it to 7000 (decimal) and that seems to be a good bit lighter touch with my screen protector on.
I would not go wild with this - my first attempt, making it 1600, made the screen dead to touch (see above for recovery) - tried 9999 (ok but seemed harder) 8000 (normal) and 7000 (a bit more sensitive)
Interested if anyone else tries it, what they think is a good setting.