HP CDE with ELO Touch screen

Hello all

Trying to get a touch screen with the ELO Touchsystems driver to install. The display works normally as far as a regular display goes, and the mouse functions normally too. However, using the supplied setup program, it would appear the system does not recognize the device. When going into the software calibration function of the setup program, you can move the mouse around normally and see the display, but you cannot select any of the buttons with the mouse and the touch screen function of the display does not work either. We've tried assigning the touchscreen to another device, but no go. This is an HP 9000/778 with HP Unix 10.20, using the HP CDE.
Where are the configurations for the HP Unix stored, the configurations that tells X windows what sort of display you have, what kind of mouse, etc.? In BSD Unix it is stored in XF86Config, where is it in HP Unix? How does HP CDE know what sort of display, mouse, keyboard you have, and what drivers to load? If I can find this, we can probably manually configure the system to accept the touch screen.

All help needed!

thanks
Mark C.
Arizona