Restore UBUNTU grub after reinstalling Windows

[elmo]

I had removed Windows XP some time ago and was running solely on 
UBUNTU.  Then, I had to restore Windows at the insistence of my great 
grandchildren so they can use their CDs on my computer when they visit.

UBUNTU is on the first partition on my second hard drive and Windows has 
been reinstalled back on the first partition on the first hard drive.

After I had removed Windows, UBUNTU's GRUB worked fine (except for not 
booting Windows).

 As expected, when I reinstalled Windows, I no longer get a GRUB boot menu.

Some time ago, both Windows and Ubuntu were on the same drive (different 
partitions, of course) and if I removed and reinstalled Windows, I could 
easily restore grub with the command  'grub-install  /dev/hda' using 
Ubuntu's CD.

Now that UBUNTU is on the first partition of HD #2 and Windows is on the 
first partition of HD#1
,  I tried 'grub-install /dev/hdb'  while  running  the UBUNTU  CD 
-----no luck.

I've not found any information that pertains to my situation.

I've so much work tied up in my UBUNTU that I don't want to have to 
reinstall it.

HELP!!!







 .