How to add a blog post page to blogmu theme navigation bar

Hi guys!
I have installed blogmu theme to my blog and it is great. But I have two question here:
1. In the main portal blog, how to add a blog post page to the navigation bar. The idea is that I want to have a navigation tab linked to my post in the main blog as normally a single site WP theme display in the front page.
2. I have several personal and business blogs under this domain and I want to keep the theme similar. But I just want it to be a normal blog and display the posts in the front page. (No fancy front page as the main blog front page)

Thank you!