Lets say I want to buy a movie like "Citizen Cane" and lets say I want to do this via the internet. Also, I would like to watch this movie on my video iPod. Do I need some special software? Do I need to buy Quicktime pro. I just got an older iMac and a video ipod. I'm chomping at the bit to use the iPod to watch movies. I've been very successful at using iTunes and the iPod to capture, organize and enjoy music files. I'm ready to move on to videos and movies. What do you recommend my first step should be.?