I THINK I know where you’re going with this, and it seems unlikely that it would work. the only reason this ever worked witht he psx/ps2 controllers is that they had two different hw configurations, one for analog games, and one for non-analog psx games which wouldnt work with dualshock/analog controllers. there’s no guarantee that disabling the analog would do anything besides make the joysticks run digital. the d-pad likely acts as a hat-switch instead of a pair of joystick axis, so you should probably first check to see if your game supports use of a hatswitch and, if it does, to what extent.

on the other hand, this link seems to have some sort of fix for your problem so i cant say for sure, lol:

http://forums.ps2dev.org/viewtopic.php?t=7099&postdays=0&postorder=asc&start=330

Wikipedia disagrees with you by the way:

Computer and video games

Some simple haptic devices are common in the form of game controllers, in particular of joysticks and steering wheels. At first, such features and/or devices used to be optional components (like the Nintendo 64 controller’s Rumble Pak). Now many of the newer generation console controllers and some joysticks feature built in devices (such as Sony’s DualShock technology). An example of this feature is the simulated automobile steering wheels that are programmed to provide a “feel” of the road. As the user makes a turn or accelerates, the steering wheel responds by resisting turns or slipping out of control. Another good example of this is Guitar Hero’s guitar controller. The Wii wireless remote uses a simple “bump” for feedback (e.g. moving over an onscreen button).

http://davieslim.wordpress.com/2008/09/15/use-ps3-controller-in-windows-wireless-bluetooth/

http://davieslim.wordpress.com/2008/07/21/using-ps3-controller-in-windows/

http://www.winds3.com/en/index.htm

it fully supports PS3 controller on Windows via bluetooth.

darkzero thanks bro