[K12OSN] Intel PXE 0.99b ltsp booting

[Vince Callaway]

Thanks for setting this up.  I will go in later today and do an update.

I found the PROBOOT.EXE utility and updated the cards to the newer boot
agent.  I had a bit of an issue because floppy drives, windows and DOS
disappeared from my home many years ago.

I found a cool little tool that lets you pxe boot any boot floppy.  It
came with the freedos boot image.  I was able to pxe boot dos, run the
update tool and upgrade the firmware.

The newer firmware boots MUCH faster.

By this evening I will have all of this on the wiki.