chkdsk without recovery console

Hi,
I'm looking for a solution to the usual unmountable boot volume problem.

The recovery console does not see a hard drive and so running chkdsk is not
available. Is there another way to run this utility without the recovery
console? I've run a hard drive test which shows a single bad sector which
must be in the boot sector. Seems a shame to ditch the HD for a singlel bad
sector.

Any ideas really appreciated - as I've run out of them !
Cheers
Jim
.