HTC Titan: Pressure Sensitivity - Registry / other config available?

[SenseiMP]

On My (Sprint) HTC Titan/Mogul/6800, with out-of-the-box ROM (upgraded to version 3.35.651.2 (the 2/22/2008 HTC update) at the Sprint store), I'd like to increase the touch sensitivity for easier scrolling with FTouchFlo, sliding with SCLPC++, and general finger-tapping. Particularly needed since I'm using a screen protector.

Searching this forum turned up some registry edits on the Elf/Touch (HKEY_LOCAL_MACHINE\Drivers\TouchPanel\PressureThr eshold) as described here:
http://forum.xda-developers.com/showthread.php?t=360564

However, when browsing my own registry with Total Commander, I don't see the TouchPanel key (neither in HKLM\Drivers nor HKLM\Software\Drivers).

I've seen this registry setting mentioned as well:
HLKM\HARDWARE\OEM\TOUCH\CALIBRATENOTES

But I couldn't find that one either. I have HKLM\HARDWARE\DEVICEMAP\TOUCH\CalibrationData, but that seems to contain the 5 coordinates (4 corners + center) for screen calibration, no sensitivity data.

I've even tried creating the following registry keys & values:

HKLM\Drivers\TouchPanel\PressureThreshold
HKLM\Software\Drivers\TouchPanel\PressureThreshold
HKLM\Hardware\DeviceMap\Touch\CalibrateNotes

I've tried values ranging from single digits and 100's, to 50,000, to 100,000. Still no change in sensitivity either way.

So -- any clues on how to increase the pressure sensitivity on the 6800?