Code:
apt-get install grub grub-doc

grub-install /dev/hda
Then you need to create grub a configuration file.

Code:
touch /boot/grub/menu.lst

xedit /boot/grub/menu.lst
I presume you have windows on the first hard disk. Try this in menu.lst
(edit accordingly for your own kernel)

Code:
timeout 10

title 2.6.3
kernel (hd0,0)/boot/vmlinuz-2.6.3 ro root=/dev/hdb1 nomce vga=791 

title Wimpdows
root (hd0,0)
chainloader +1
savedefault