I just got my mbp for christmas and i am already a bit confused. here are some concerns/questions On my xp computer i could put an away message up on aim and hit log out. it would leave aim running and put up the password box. on my mbp i have the option for it never to sleep on, so that i just put on my screen saver and walk away and that works the same. my question is - how do i have my aim running - but switch users so that i can let my brother use a guest account - and mine still password protected. all i see is the log out, sleep restart and shut down buttons. but when i hit logout - it wants to close all of my programs. please help with this. more questions to come. thank you!