Changing Sharpness with PVR150 MCE

[dancetracks]

I've seen the registry tweak that some people have posted:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Globespan\Parameters\ivac15\Driver\SharpnessVal ue

But I don't have this value/key in my registry. Here is my setup:

BTV 3.5.1
Windows MCE 2005 with all patches
Dual WinTV-PVR 150 MCE with MCE drivers only.
Firefly remote.

Could it be that the above registry key only exists for XP Pro users with the full Hauppauge software installed? Anyone know of another way to increase sharpness?

Thanks all
-Henry