SharePoint - Create pages with left navigaion

There are plenty of internet pages that teach you how to add left navigation while you create a site page by using SharePoint designer, however, this is definitely not necessary. Any pages changed by SharePoint designer will turned to ungosted and not good for program package. A straight way is locating the correct entry to create page. Here follows steps.
1. Site Action - Manage Content and Structure
2. Click the small right triangle beside folder "Pages" from the left navigation menu. Click New - Page.
3. Name the title, URL and choose page layout. I tried the Blank Web Part page.

It works great for me.