That is the correct and preferred method to reinstall Help and Support on XP.
However, if you really want to reinstall Help and Support, without using the online M$ Technical Database (Knowledge Base), then backup all your important data, etcetera, Fdisk your computer and reinstall your system as per your OEM Recovery CD.
Better still, if you have a genuine qualifying Windows 98/ME/W2K CD, then you can invest in a genuine Windows XP upgrade CD and perform a full 'clean install', which is the correct way to install any OS, IMO.
Fdisk: -
http://www.blackviper.com/Articles/OS/fdisk/fdisk1.htm
Clean Install: -
http://www.michaelstevenstech.com/cleanxpinstall.html
Good luck anyway………
