Parent/child Order By

Hi,

I have a single table that contains Pages. Any page can have child pages (nth levels).

Root pages have a parent_page of 0.

id-----parent_page-----level-----title
--------------------------------------------------------------
1------0--------------------1----------About Us
2------1--------------------2----------Industries
3------1--------------------2----------Presence
4------2--------------------3----------Know-How and Technologies

I'm trying to get child pages ordered under their parent. Does anyone have some ninja sql skills to make this happen?

Thanks,

Matt