With ArcPad 10.2 I got the dll installed and I could set the path and name of the text file without an error message. I have the FakeGPS selected but ArcPad is still hitting the GPS NMEA protocol even though it is set to the FakeGPS protocol. So close to getting it work, so now I am working on making the text file (log) super clean but it is my last idea on why it is not working.
I cleaned the log file up and it is working great. FakeGPS works with ArcPad 10.2. Just make sure to delete the headers from the text file (created in the table export) and add the ,EOF at the end. Preferences are set when you first select the FakeGPS protocol. I can send the Fake log file I used if anyone needs to review the formatting of a working log.