This improved my lag from 3 seconds to about .5 seconds.
First install
NET Compact Framework 3.5
Next install and Run
Advanced Configuration v3.3
1. disable A-GPS (should be default)
2. disable GPS logging
3. logfile name must be empty
4. old logfile name must be empty
5. maximum size of logfile must be 0 (should be default)
6 delete the files : \windows\GPSLogFile.txt and \windows\GPSLogFileBack.txt