I am a proud owner of a powermac g4, and I am running os x tiger 10.4.0. Anyways, I am really bad at dvd burners and I am looking to buy one for my mac. Here's the problem. I've looked and looked all over google to try to find an inexpensive 100$ or less one that is compatible and worth the money. I'm not sure that I understand the difference between an internal and external drive either. Does external mean that it kind of just sits outside of the computer and doesn't have to be actually installed, but is connected through the usb ports? Also, if you recommend internal rather than external where is the best place to buy/get this installed because as you can see I obviously will not be able to install this myself. Thanks for your time! -Vince