I have successfully installed Centos on my MacBook, but now I can't figure out how to boot into it. Previously, I used Boot Camp to dual boot into Windows XP. I'm pretty sure Centos installed a GRUB boot loader, but when I hold option down on startup the only option is my Mac drive (I deleted the Windows partition to install the Linux side). How do I boot into Centos on my MacBook, and can I use Boot Camp like I did with Windows? Thanks a ton!