Hi there,
It really depend on you how you want to setup your EasyBlog on your site. You do not need to install all modules that come from EasyBlog. You can pick the modules that best suit your site layout structure. E.g where you want your module to display at, and at which position. All these count when setup your blog
You might want to read our online tutorial on how you can setup your EasyBlog
http://stackideas.com/docs/easyblog/administrators/welcome
Hope this help and have a nice day!