I have written a program to let people insert their names into map files that they create. The information gets transferred into .sav files based on the map.
The first time that you run this program and open a .map file within it, it will let you insert your name into the file. Subsequently, it will tell you what name is in the file but will not let you change it.
If you open a .sav file instead, the program will tell you the author (if any was specified) of the underlying map.