Maybe it’s better not to mess around with the code if you don’t know what you’re doing.
A page is always static and is not intend to display dynamic content per se. Whereas a post is the other way around. Saying that, the portfolio consists of dynamic content in the first place.
I recommend a plugin that enables you to add static content to dynamic content or vice versa. Andy you don’t have to mess with the code.
Cheers,
Alexander @ http://www.mouseclick.com