No prob, one program I have been turned onto lately that would work good, but its pretty expensive is
AutoEnginuity. I guess a lot of the PSD tuners use it, and a lot of the racers use it for data logging and such. I'm not exactly sure on a price but I heard its around $300 or so. I would love to have it but will be pretty far down the list of things to get due to that price.
I don't know too much of the computer engineering or whatever it might take to get the cable to connect to your truckPC or for transferring the software though, wonder if maybe you could somehow dock the PDA to the computer somehow if you can't find a more hardwired solution.