Multi User custom packege?

Hi,
I am searching for solution regarding MultiUser. I need my system to be able to copy all content of the main site, when i do create new subuser under WPMU.

Right now when i do new user as subdomain, system creates it, but this user has only 1 default page "Hello world" and do not copy other pages and posts.

Can someone help me with solution regarding this.

Or.. if it posible - how i can create customized package of wordpress, that will be installed every time, when i do new subuser?
Thanks