If you are not using samba or nfs why don't you just disable those services? The easiest way to do this would be to simply remove the execute perms from the run scripts.
As root simply
Code:
chmod a-x /etc/rc.d/rc.nfsd /etc/rc.d/rc.samba
It is generally a good idea to disable any services you don't use because they add to your machine's footprint and thus could potentially pose a security risk.