here is the differance between xp home and pro
Home and Pro - Differences
Windows XP Professional include unlike Home Edition the follow features: SMP support, Roaming user profiles, Remote desktop, Access control, Encrypting file system, Offline files and folders, Remote installation service, Windows server domain support, Group policy, Software installation and maintenance, and Multi-lingual user interface support (add-on).
tons more here
http://www.winsupersite.com/showcase...p_home_pro.asp
cheers
egghead