all you needed to do was edit the menu.lst file to include Windows. it is too late for that now. do this:
if windows and Ubuntu are on the same drive in #6 use setup (hd0).
1. Boot your computer up with Ubuntu CD
2. Open a terminal window or switch to a tty.
3. Type sudo grub. Should get text of which last line is grub>
4. Type "find /boot/grub/stage1". You'll get a response like "(hd0,1)".
Use whatever your computer spits out for the following lines.
5. Type "root (hd0,1)", or whatever your hard disk + boot partition
numbers are for Ubuntu.
6. Type "setup (hd0)", to install GRUB to MBR, or "setup (hd0,1)" or
whatever your hard disk + partition # is, to install GRUB to a
7. Quit grub by typing "quit".
8. Reboot and remove the bootable CD.