Windows XP A to Z - http://www.softwaretipsandtricks.com/windowsxp
Classic Start Menu Style
http://www.softwaretipsandtricks.com/windowsxp/articles/129/1/Classic-Start-Menu-Style
Super Admin
 
By Super Admin
Published on 02/23/2005
 
This tweak (group policy setting) forces the display of the Windows 2000 style Start menu and the display of the standard desktop icons.
Classic Start Menu Style

START > RUN > type GPEDIT.MSC > USER CONFIGURATION > ADMINISTRATIVE TEMPLATES > START MENU AND TASKBAR > find FORCE CLASSIC START MENU > check ENABLED > OK > REBOOT

If you check DISABLED only the XP style Start menu can be displayed.
If you check NOT CONFIGURED the user can change the view.