Richard,
Assuming you are playing with XPe SP2 (TP or Eval).
You can start with "Generic Bluetooth Device Support" component which will bring in pritty much all the bluetooth support components
(HID, Printer, Modem, etc.) as dependencies.
From generic driver support you would just need "Class Installer - Bluetooth", "Class Installer Library - Bluetooth" and "Primitive:
Bth.inf".
KM