If you're looking for information about the site in general, i.e. not specifically the My P.L.A.N. tool, then click on the link below and read every item:

http://forum.lowcarber.org/showthread.php?t=95688

If you have any further questions about using the site, you can ask questions on the "Comments Box and Technical Forum," which you will find at the bottom of the main page of the website.