I've already started hacking my unit so I can push F/W, add a battery, etc.
I've attached several photos. If you're into Amateur Radio, you can probably obtain some old scrap Motorola HT1250 portables.
They can supply shields for the front-end as well as a button for P2 (to put the unit into DFU mode)
To place the unit in DFU (Programming mode) you only need to short P2 when applying power - so I installed a push button - push button/apply power/release button - works great.
The radio shields (there are two on every HT1250 that will fit) need to be slightly trimmed where there is a surface trace to prevent shorts and impedance issues.
Finally, for your question regarding interfacing to the PC, I've successfully installed the serial driver and the DFU driver and have pushed new firmware to the device.
Cheers,
Larry
