That starts the two services.
The config files for apache are in /etc/httpd/ I believe.
I dont know where the NFS files are as I have never used it.
The Apache web root is /var/www/htdocs in RedHat I think, but I havn't used apache in RH8 yet so I don't know.
What exactly do you want to know, How to start these service or how to use them?
I suggest looking at the man pages and the docs online.