not sure what this means
"It seem to me that navigator does not like it if the window in the skin file is smaller that the size of the window set in the startup of navigator "
we get the size of the window to pass to navigator from the A line
unless your doing something odd, use rrconfig to configure to use PC Navigator 11
nothing else is needed, no complicated exectlb code, or button to load gps
just "GPS" and read the notes, you can make a custom named skin... or it will load external_gps.skin