Help with WP Pages.. Please

Hi Guys,
i spent 2 days already reading and browsing youtube about Pages on WP... and finally decide to post here my question, maybe somebody can and want to help me with...

Im working on a new site with Thesis Theme, the site is/will be a very big... and i have already about 35 Pages on Navig. Bar...

Here what i'm trying to do:

Page1 ------------ Page2 Page3 Page4 ............
SubPage1-----------
SubPage2----------
........
So, here is my Question:

HOW CAN I POST NEW POSTS IN THIS SUBPAGES ? I need The Post for SubPage1 to appear ONLY when visitors will access this Page !
And How Can i add as many Posts as i need to SubPage1, without REEDITING this SUBPAGE every time....

I know, it can be funny for you guys, but im tired already... i read Letter-Thesis-Blueprints-01, its a Great Tutorial, but there is no any points i can use to solve my Problem...

Thanks for your Time

I think you may be going about it the wrong way. While you can create as many "pages" as you like, most themes and WP in general will select only ONE page to update your "posts" on. Maybe instead of creating so many pages, change those pages into "categories" and ad your content "posts" separated by category instead. Your categories can also be used as KWs inside your URL, some people say this is effective SEO, however some say it doesnt matter.

Remember, generally WP pages are static pages, like your TOS, Disclaimer, ABOUT, HOME etc...normally your HOME page is used to display the most updated content in the form of a blog or similar showing only and excerpt of the posts content.

Im sure there is a way to do what you want to do, but Im willing to bet that the Thesis theme does not have this ability, and most will not, its going beyond the concept of WP. Thats my opinion only and I could be wrong, saw your post hanging lonely and wanted to give you as helpful and answer as possible. Hope this was helpful.

yeap, thx fro your help...
i did it, the way i was looking to do it, doesnt work with thesis, and with many other themes... but i did it with Categories, and looks good
Thanks for your Reply, Rep. added..