The Profile Control Panel:

The Test Screen is shown here.  With the Test Rumble Effects option checked, any button or trigger pressed activates the Rumble effect associated with that action.

On the Force screen the intensity of the Force Effect can be adjusted.

Desired Deadzones can be established extensively on this screen.

By selecting a trigger in the left option box, the slide control can be adjusted to provide precision for that particular action.

Here, the X-Mode option can be activated and the Left and Right Trigger controls adjusted.

The Test System:

Windows XP Pro SP2 fully updated on Western Digital 250 GB SATA
Windows Vista Home Premium OEM fully updated on Seagate 160 GB SATA
ASUS P5N-E Sli, BIOS 703 fully update
Intel E6700 Default Speeds
2 GB (2x1 GB) Dual Channel A-DATA Vistesta DDR2 in Dual Channel @ 800 MHz
ATI X1950 Pro PCIe 256 MB
Onboard RealTek HD Audio 4-Speaker Output