right click on the folder choose properties click on the sharing tab choose "make this folder private"
who even needs the manual(we know most ppl aren't qualified to rtfm!) anyway, how hard is it to fire up google....using the simple words in the GOOGLE.COM search box gets u this... http://www.google.ca/search?q=making+folder+private+in+xp&ie=UTF-8&oe=UTF-8&hl=en&meta=