Add windows OS to grub2

[ZeldaFan]

I have ubuntu karmic installed on my primary hard drive with grub2. I have another hard drive with just windows xp installed on it. How do I add an entry to grub2 to have my second hard drive visible under grub2 (both hard drives are internal)?

[darkod]

In Terminal run
sudo update-grub

It will write few lines, usually there should be something like
Found Windows XP on /dev/sdb1

Reboot and there should be Windows XP in grub menu, try it out.