There are two approaches to a KickStart install - one is to simply copy your KickStart configuration file to a RedHat boot floppy. The other is to use a regular boot floppy and get your KickStart config file off the network.
In both cases, you'll need:
If you want to fetch your config file over the network, you'll also need:
It may be possible to do without the BOOTP server - this is certainly implied in the KickStart documentation. I've not tried this myself. Likewise, you may be able to install off a CD-ROM rather than an NFS server. If you try either of these, let me know how you get on, so that I can fold your info back into this document.
Note that it's not strictly necessary for the NFS server to hold both the RedHat distribution and the KickStart config file - just makes things a bit simpler to have everything in one place.