how to reinstall windows xp without a cd REALLY WORKS

this video will show how to re-install xp without a cd. i tried this on my computer and it worked but i dont know about everyone else. in the search box i typed 'winnt32' it will take over 1 hour in total dont go on repair after it reboots. REMEMBER TO SAVE ALL THE FILES THAT YOU NEED SOMEWHERE ELSE FOR SAFETY AND KEEP A BACKUP OF EVERYTHING. ALSO NOTE DOWN THE APPEREANCE BECAUSE IT CHANGED IN MY COMPUTER, THANKS FOR WATCHING please rate