I have found that each SP****.EXE is generally accompanied with a corresponding
SP****.DOC file with some basic info and instructions. I have found they are
all the same though really:

  1.  get the .exe onto your system somehow
  2.  execute it and follow the instructions

They generally ask you to stick in a scratch floppy and reboot. I appreciate
that they generally store the previous/old contents of what they are replacing
back onto the same floppy so you can roll back if you want to later. If you
ever do boot your setup partition, I highly recommend making three floppies
while you are there:

  1. setup
  2. diagnostics
  3. minimal boot floppy (format a:/s) with goodies like format and fdisk.

There's a little menu to guide you though the first two. These have helped me
several times straighten things out such as for the new disk and when I
installed Linux.