There was some discussion on the Yahoo dstar_digital list today about periodic transmissions of your position using DPRS but without having a GPS. A couple of ideas were tossed around, but Chris, N9HY posted a little bit of 'C' code to do this.
I have expanded on it and have published it to my website here. This compiles under MinGW (a minimal install GCC based C compiler tool chain that runs on windows) just fine.
It takes a position report in GPS GPLL format from a specified fileand sends it to STDOUT, once every delay period. It will reread the file subsequent to printing it, therefore picking up any changes in the file. This is inteded to send the GPLL string to a com port by redirecting the program's STDOUT to the desired COM port when it is run from inside of a batch file or DOS windows