You mean for the 3rd party Bluetooth Phone app included on the CD? It has a desktop component that will look for new phone drivers and add them to your iPAQ. Even if your phone isn't listed, you can generally select the generic driver or another model made by the phone manufacturer instead.
If that doesn't work, you can try using the iPAQ's built-in Bluetooth software which really doesn't much care what brand phone you're using.
-------------------- Lisa Gade Editor in Chief, MobileTechReview