NT Port install - mount problem

Needing to keep a Postgres database alive while I upgrade my RH Linux
server, I decided to try installing the NT port and running the database
there while ugrades were underway.  I am using Kevin Lo's instructions
(http://www.freebsd.org/~kevlo/postgres/portNT.html) for the
installation.  After installing FULL.EXE (Cygwin), instruction step 3
under "Install the Cygwin package" reads:

   3. Run Cygwin, and then run "mount c:/Unix/Root /"

When I do this, I get back the error message:

   mount failed: Device or resource busy

I am running NT Server 4.0 SP5 with administrative privileges.  Nothing
else other than the bash shell is running.

Any ideas as to what might be causing this error?  Could it be because
the NT paging file is open in C:\?

Any pointers would be appreciated.  Thanks in advance.  (I wish I had
another box to put Linux on :(

Cheers,
Richard Blackwell
Programmer/Analyst
Dept. of Psychology, Simon Fraser University
Burnaby, BC Canada