Click on the Support link (at top of page)
Click on "Software & Drivers under "Download Centre"
Click on "Laser Printers (left side of screen)
Click on "AR5520N"
Click on "Windows XP"
There are 2 drivers and 1 utility available for download.
MFP Driver supporting WHQL (Integrated Installer for SPLC Printing & Scanning)
SC-Scan A Utility
AR5516/5520 Button Manager Utility - (required for USB and Network scanning)