Blogger HTML code help! (3 columns instead of 2)

Could someone help me change the blogger HTML code so there's 3 columns/frames instead of only 2.

Here's the website: http://celebritat.blogspot.com/

Also, the second column, on the right, at the moment is too small to fit even the google search box.

 

I'm sorry, maybe I hadn't made myself clear. I thought this forum would be appropiate even though it's not blog related but it has to do with HTML altering from what I can see.

I would basically like to add 3 vertical columns instead of just 2, which is the default template.
(One for links, main one for the article and the third one either on left or right for the ads)

Here's an example

 

hackosphere.blogspot.com/3006/09/3-column-templates-for-blogger-beta_01.html

 

Thanks alot!