Frontier Theme and Menus

This may not be a specific issue to the Frontier theme, nor am I for sure I’m putting this in the right place. I’m currently using the Frontier theme on a test site and it supports only two menus, one at the top right (above the title area), one at the top left (below the title area). I want to be able to establish multiple drop-down menus in the place where the left menu currently is that spread across that section. Is there a way to do this with the current theme, by addon or some other way that won’t be too difficult to implement?