Place the following .htaccess in your public_html directory. RewriteEngine On RewriteCond %{HTTP_HOST} !^www\. RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L] Code (markup): Ta - Da! All links pointed at domain.com go to www.domain.com If you would like a better explanation of what this does, check out the actual "Force WWW In URL With .htaccess" tutorial on the Promotion & Marketing Techniques blog.
I usually report and go after these type of posts, but since you actually posted the method with your link I don't consider this spam, but it is border line. Thanks for the info, will help some amature webmasters for sure.
I try to put the essential info in the post, but not copy and paste the post from my blog so there's no duplicate content. (I hate those kinds of posts too, that claim a tutorial, and just forward you to their site.) Thanks for the feedback, I hope this helps you and everyone else out!