If your client machines are older and do not have pxe built into the
bios here is a good link that explains how to add gPXE to the existing
bios. The caveat would be your need a new enough mobo that has an 4MB
bios chip(free space/for adding the additional code). This article shows
how to add an additional chip setup,which you do NOT need! But,
the details you DO need. I used to add pxe to quite a few mobo's 6-7
years ago to either Award or Phoenix bios's (which are now one company).
This seems pretty cryptic,but if you have several usable mobo's laying
around this will be a nice setup for your situation.
Here is the link: http://www.etherboot.org/wiki/biosext
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