I have movies in iTunes that I ripped using Handbrake. I tried to burn one to a DVD by inserting a blank, and dragging the movie over the blank icon. It looked like it was working, but after completion it said error, and doesn't play. What's the best way to do this? I also have made a Places slideshow in iPhoto (with maps, music, photos). How can I burn that to disc? I have a book about Lion, but these aren't covered and I appreciate any suggestions. (I posted this in iMac but it's probably more suited here).