"One of the selling points of 'LiveCD' Linux distributions is that they allow you to try out Linux on your computer with out touching anything on your hard drive. Sometimes, however, you you want to do exactly that. While playing with a Ubuntu LiveCD on my Powerbook, I decided that I wanted to do exactly that. These are the steps that I followed, after some Googling led me to this thread on the Ubuntu forums.
Please Note: By default, the Ubuntu LiveCD will not touch your hard drive. This is for your safety. The steps below allow you read and write to your hard drive's OS X partition while running Ubuntu from the Live CD. If this makes you in any way nervous, don't do it. If you don't know why it should make you nervous, don't do it. I make no warranties. You could lose all your data, your job, or your hair. In fact, you should just stop reading now, and go watch television."
