It's main function is to convert dss,duc,dat and sps saves. i threw in sav because it's the same format just either renamed or a short file. for example, if you take a .sav out of VBA, it will not likely be the correct size used by the g6. Now, supercard uses .sav and is the right size so that is just a rename, but there are more file types than just the supercard's .sav format.