If you are creating a lot of blogs that are identical in their configuration (plugins, theme, settings) you can save a lot of time by creating a master blog that can be replicated with ease if you have cpanel hosting.

To prepare your master blog you will need to set up your blog exactly as needed (including plugins and theme) and then zip up all of the contents in your web folder (/public_html/)

This will be your master blog file.

The next step is to...