Hi Steve, perhaps if I post the details in the forum rather than e-mailing them it might be of use to others at some point:
When switching to/ from SiRF mode on your GPS? I use the following method:
Download TTN GPS driver 2,06 by clicking the following link:
http://www.pocketgpsworld.com/module...=getit&lid=135
Once you have the download on the PC simply unzip it, the single file you are looking for is ttgps206_arm.CAB copy this CAB file to your PDA.
Use File Explorer on the PDA to locate the CAB file and tap it, this will start the installer, just answer Yes to the annoying prompts windows asks.
The application will now be on your PDA, the icon looks like a satellite dish and can be found in the programs section on the PDA.
Start the application and go to the GPS tab (located at the bottom of the screen). Use the Top dropdown box to select the mode you want the GPS to be using, this could be SiRF or NMEA depending upon what you want to switch the data output mode to, make sure you select the correct Baud rate at the same time as the data type.
Make sure the second drop down box is selected to your GPS device, you might find this changes when you select the first dropdown box, so always re-check this.
Click the grey box (Top Left) then go to the Status tab to check you have data.
This method makes it very easy to switch between the two modes, it takes seconds, and better still it costs nothing. Once you have finished the switch make sure you terminate the GPS program before running any other GPS related application. You can use the application to datalog, it cannot alter the SiRF parameters, to alter these will require use of another application.
One final point this GPS application is a standalone application in its own right, it does not alter your existing TTN5 or 6 GPS related driver, I have seen questions before wondering why this doesn't "upgrade" the version 5 GPS driver - the simple answer is that it has nothing to do with TTN5 - Mike