Let's say I want to use iCal and my iBook as an alarm to wake me up in the morning. I have an annoying backup one just in case I don't wake up. But here are my only concerns: 1. If I set it to play a song at 7:30 AM, and it's on the screensaver or it's asleep , will it still work? 2. This may sound stupid to some of you, but not a novice like me. Does iCal have to actually be opened to work or can I quit the program and have the alarm still go off? 3. Can I set a playlist to play instead of a song? This will help me out a lot. Thanks!