microsoft word make landscape orientation on certain some few one page

I have 10 page with portrait. Just want to make page 5 only to be landscape cause its a diagram
Take me 30 minutes, until this tell me how to...

http://tortoiseshell.net/coffeebreak/blog/index.php/62/word-2007-practice-how-to-make-one-page-out-of-many-landscape.html

thanks internet