I asked the NFS team about this. Here is the response:
SUA, which the customer has installed, does not include any NFS components.
What the customer is looking for is "Server for NFS," which is only
available in Longhorn Server editions.
However, if the customer is interested in accessing NFS shares from either
Vista Enterprise or Ultimate editions, then the customer can install "Client
for NFS" (under "Services for NFS" in Vista's optional features list).
This posting is provided "AS IS" with no warranties, and confers no rights.
Want to learn more about Windows file and storage technologies? Visit our
team blog at http://www.yqcomputer.com/