Hi!
IP passthrough through ActiveSync is not supported by OpenTrek.
I have tried IP passthrough for communication between the PDA and the stationary computer, but the current implementation of ActiveSync does not forward any broadcast packages to the local computer (which are necessary for devices to find each other).
What can do however is start multiple instances of OpenTrek on the same computer. I use this exclusively for all development, and then just recompile for the Pocket PC when I'm done!
Best regards,
Johan