I have no img file. My cgpsmapper is installed c:\program files (86)\cgpsmapper. When you refer to my batch file, do you mean the "batch scripts" I downloaded from this site which came as "cgpsmapper.bat"? If so, do you mean put cgpsmapper.bat and TrialTrack.mp in same folder and double click on cgpsmapper.bat? Not on the individual files as per tutorial #9. I know this sounds so simple to you but I'm trying to comprehend it step by step not really understanding what's taking place. In the words of one of my friends, "I'm old as dirt" and have turned on a computer for the first time in feb 2010, but I'll get it. Thank you lb