Insert the installation boot diskette into your floppy drive, the RedHat CD to the CDROM, and reboot. If you can boot from the CD, insert the RedHat CD into your CDROM drive and reboot.
You may also start the installation from DOS (or real DOS mode under MS Windows), by running EZSTART.BAT which is on my RedHat CD from Cheapbytes.
Most installers give you an option between text and graphical install. You need to select "text" if your computer memory is restricted. On modern computers, I always use the graphical installer.[an error occurred while processing this directive]