Per User Display Settings

Though Windows XP doesn't support per user screen resolution.You can see this here:- http://support.microsoft.com/?kbid=832295

But there are some utlities which will allow users to do :-

XPKeepPerUserDisplaySettings

http://www.myitforum.com/inc/upload/1365Vidchng.zip

http://www.dougknox.com/xp/utils/xp_userdisplay.htm

http://www.snapfiles.com/get/uniquedisplay.html