I am running Leopard and am considering upgrading to Snow Leopard.... I bought my Mac from a friend and it has Garageband, iPhoto, iMovie, iDVD, etc. installed but I do not have any discs with them. If I upgrade will these programs be lost? Is there any way i can put them on a disc myself...or can i back it up to an external hard drive and get them back on after the upgrade. I am a new Mac user and have no idea what I am doing. Any suggestions are greatly appreciated!