Boot the to-be-installed machine off your RedHat boot floppy as usual,
but instead of pressing RETURN at the SYSLINUX
prompt, type linux ks.
If you're lucky, this will be all you have to type!
Since we're really just automating the normal steps involved in a RedHat installation, the normal dialogs may appear if/when KickStart gets confused about what to do next. The most likely case is that your network interface won't be detected automatically, and you'll be prompted for its IRQ and I/O address space.