Alright, so I downloaded Ubuntu 8.10 to my computer and then properly burned it to a DVD (Yes, I checked, the ISO is fully extracted on the DVD). I turned off my MacBook, held c during the boot logo, and it launched into Ubuntu. I followed the setup instructions and continued. It asked me to reboot. I did. Ubuntu didn't install correctly and OS X was overwritten. I partitioned my HD, and I had to completely reformat by OS X restore disk and Disk Utility. Yes, my HD was partitioned as in Disk Utility there were 2 partitions! So yeah... Before I try it again, I want to know what I did wrong.