Re: Reformat hard drive and networking question
Your MAC is hard coded as you stated ... so you wont lose that information. Your ip address is another story. Is your router set to issue DHCP? If so, then as long as your NIC is configured to receive an ip address automatically, it will get one assigned to it from the router. Odds are ... it may even be the same one as you had prior to reformat, because the router has already matched an ip address with your mac address ... therefore will probably give the same address again. Unless of course it's been assigned to another pc in the meanwhile.
If your router does not issue DHCP ... then you will have to manually enter your IP address, which if you've written it down as it was before, then you will be able to input the same ip address.
After reformatting ... you'll need to confirm that your NIC has drivers installed. Depending on your NIC ... XP will be able to install a generic driver to have it function on a basic level. If XP doesn't recognize your NIC, then you'll need to go the NIC or mobo manufacturer's site and download drivers.