[MrGoodtunes]

4 gradients? I guess you're using HTC Home plug-in, I don't, but we should both be able to see the Windows Mobile adjustment by tapping:

Start > Settings > System (tab) > Backlight

Here you'll see there's more than just 4 levels. The path asked for in subject header is:

\Windows\Backlight.exe

I've put this on the right softkey, using KeySwop by Vicott Wong, so I can crank up the backlight when outdoors, without needing to guess where the button is. One thumb on the lower right corner and then the thumb presses and holds the right directional edge of the navigation pad, until it's bright enough to read (or almost enough at max in the burning Florida sun).

Hope this helps, MrG