Tomsrtbt: Linux on a floppy
  1. Download the tarball to your Linux system: tomsrtbt-2.0.103.tar.gz
  2. Extract the archive:
    tar -xzf tomsrtbt-2.0.103.tar.gz
  3. cd to the folder:
    cd tomsrtbt-2.0.103
  4. Become root:
    (and type in the password)
  5. Insert a floppy in the floppy drive
  6. ./install.s
Now reboot from the floppy.

More information is at: FAQ