Help. I think my boot sector craped out

[Michael Havens]

I have uubuntuu10 installed on my hard drive. I don't have the cd for
uubuntuu 10. I do have the cd for mepis 6.5. How do I reinstall the
boot sector? How do I figure out if it is the boot sector and not a
hard drive failure. If it is a haard drive failure could someone mail
me a uubuntuu cd? I have a few hard drives I can use.
-- 
:-)~MIKE~(-: