Rassel

This might be impossible, but I thought I'd check anyway.
I figured I would remove the Nokia phoneholder on the right side of the centerunit and put a Pocket PC there instead. The PPC would be used with a bluetooth GPS puck.

Here goes the questions:

1.) Is there a good way to hook up a PPC with a OBDII?
2.) Can I connect the PPC to the OBDII inside the center unit, or do I have to have a cable running from the outside?
3.) What software exists for PPC to read from the OBDII?
4.) Where do I find the errorcodes for the car?
4.) Where would you put a GPS puck? Front windshield, or rear?

Thanks