This topic describes the CSG v1 file format. This is used by versions of the Saved Game Manager prior to 2.0.
A CSG file is just a ZIP file with the saved game and a special description file. The description file is plain text and is called SGMAN.DSC. An example file follows:
Owen Transport Ltd, 3rd July 2001 TRT35.SV1
As you can see, it's very simple. The first line is the title of the game. The second line is the filename of the game.