Usually, The problem is not adding it to the save list, but finding it once U have added it. Let's say U edit a garage in MK's, and save it with a name like "My Hybrids". Then U open your xport, and import the save, the natural tendancy is to look for the save "My Hybrids" in the list of saves. However the xport will change the name to something like GT3GAMEDSave0126-096700.sps. So I found the easiest thing for me to do was to delete all GT3 gamesaves from that list, (U can copy them to a different folder first if U want), so then when I import my save, it's the only GT3 save in the list. I then restore it to my card, and delete it from the list as well.