Re-installed os 8.5.1 recently, and wanted to add the alert sounds I originally recorded in Simple Sound (they disappeared when I re-installed). I recorded and cleaned them up using Sound Studio, and then followed the Help center directions for adding them- I changed the creator and type using MacLink Plus, and the icons then looked like simple sound icons. Double clicking on them opens up simple sound, but dropping them on the closed system folder does not put them in the alert sounds, like Help said it would. They just sit therr in the system folder. Do I need to convert them with something, or should changing the type and creator been enough?