If I have a HTTP, FTP, or NFS server for installs, how can I reinstall Red Hat Enterprise Linux without using a physical disc to boot from?

There are a few ways to achieve installs without using cd media. This article will cover one way. This article is assuming two things:

1. This system was already installed with Red Hat Enterprise Linux or similar Linux platform using the GRUB bootloader.

2. That a HTTP, FTP, or NFS install server has been set up from which to install (Directions for setting up an N...