repairing grub after reinstalling windows

using ubunt, can't boot ubuntu after installing windows server 2008.  found a few sites.  This article helps me to solve the problem. below is the summary of the steps.

after booting up from live cd

1. sudo grub


2. find /boot/grub/stage1


3. find /grub/stage1


4. grub> root (hdX,Y)


5. grub> setup (hd0)


6. grub> quit