Nav Bar

Hi, I'm trying to add an extra link to the bar at the top of the layout, I just want to add a link to the livejournal main page. I've tried using the Recreating the Navigation Bar tutorial but while I can add an extra link and change its name, I can't change the actual link the words link to.

I've been looking for a while, but I just can't find a tutorial that helps. Could anyone please direct me to a relevant tutorial? Thank you!