[ale] How do I get grub on an alternate disk?

[ale_nospam at fayettedigital.com (ale_nospam at fayettedigital.com)]

I'm putting a new disk on my wife's computer.  She dual boots with grub
and I'm just going to hang the new disk off temporarily and dd partitions
over to the new one.  The only think I can't figure out is how to run grub
to write the MBR so it will boot correctly when I make the new drive the
default.

Any suggestions?  After I move the new disk in place, can I run Knoppix
and somehow run grub using my menu?

Thanks,
Jim.