I have old Toshiba Satellite A-80 Laptop with XP Home. I want to format my system and install Windows XP again. The problem is that my CD/DVD ROM is not functioning. I dont have an option to boot from USB in my BIOS. I dont want to purchase USB CD ROM. My BIOS has an option to boot from LAN. I surfed on net on how to boot and install xp from net, i found something about RIS Server and PXE, but I could understand nothing out of them. I dont have a Windows Server Machine. I have another machine with Win XP SP2 and Ubuntu 9.04 installed. I want to use this system to format my laptop. Can somebody guide me on how to format my laptop using another system without Windows 2003 RIS server.

PXE is just to set the boot to Lan in the bios.
You need a machine which has Windows server Edition installed.

You can do this.
http://unattended.sourceforge.net/step-by-step.php

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