Hi there - really sorry if this has been posted elsewhere/is a complete newbie error! Just got my first mac (new Macbook Pro!), and tonight for the first time tried playing a DVD on it. Was all very swish, till a little while into the film the mac went into sleep mode (also when I woke it back up the dock had disappeared, but I managed to get it back). In the end I turned the screensaver and sleep modes off altogether, but that's obviously not an ideal solution. Is there a way to stop the mac going to sleep/turning on the screensaver when it's playing a DVD? Cheers!