On the A8N-E, Windows XP should install on your SATA disk without any special procedure. Be aware that WinXP without any service pack is very vulnerable to attack, so do not plug it into your broadband connection without a router inbetween the computer and the modem.
<Internet> ---- <modem> ---- <router> ---- <computer>
and not
<Internet> ---- <modem> ---- <computer>
I made a page about getting WinXP installed without getting worms, maybe it will help someone:
link to it Welcome to the Forums, hope that helps
edit: also, install Service Pack 2
before your motherboard drivers, to ensure that your USB2.0 works normally.