GRUB and Booting Linux

Once you have a working install of Linux, you may find out that you can't get back into windows. This means you have to set up the bootloader to give you an option to boot into windows. Doing this is fairly easy:
1 - figure out the partition number that your windows install is on, for example /dev/hda1 2 - while in Linux, edit /etc/grub.conf or /boot/grub/grub.conf (same file) and add the following entry (assuming /dev/hda1 is your windows partition):

title Windows
root (hd0,0)
makeactive
chainloader +1

The root (hd0,0) means first drive, first partition (/dev/hda1). (hd0,1) would be second partition (/dev/hda2), (hd1,2) would be second drive, third partition (dev/hdb3).

Once you have this included in your configuration, you need to run grub-install - like this: `grub-install /dev/hda`
This should print out that it has updated the MBR (Master Boot Record) and if so, you now have a dual bootable system!