XP and versions of Windows that came along after it have different methods of network discovery, making it difficult to network between them and XP. I used to use Netowrk Magic, but I don't know if it's still available since the company that originally had it was bought out by Cisco which then discontinued it. Anyway XP has been unsupported since 4/8/14, so It's probably best to just either upgrade that XP computer to Windows 7 or 8 or go to Linux.
I've used the Mint, Ubuntu, and Puppy versions of Linux and found them to work well. They have user interfaces similar to Windows and will network with Windows computers. Ubuntu is the most popular of the 3, but I like Mint best because it's the most like Windows and comes loaded with a good bit of software. You can download the ISO for it here: http://linuxmint.com/download.php and burn it to a DVD then boot from the DVD and be up and running in 3 minutes in trial mode without having to install anything to your hard drive.
Edited by wpgwpg, 11 July 2014 - 01:54 PM.