newbie to networking needs to share printer with Vista and XP desktops

Hi,
I know nothing about creating networks! I have a Vista desktop which has a wireless link to a BT Home Hub, and an XP Pro desktop which connects by ethernet to the same home hub. I have a non-wireless-enabled printer which is installed on the Vista desktop and is connected to it by USB cable. How do I go about sharing this printer with the XP desktop as well please?

See suggestions given in similar type of threads: http://forums.techarena.in/windows-v...ork/983792.htm
http://forums.techarena.in/vista-print-fax/953167.htm
http://forums.techarena.in/windows-v...rk/1031435.htm
http://forums.techarena.in/vista-print-fax/919548.htm