Insert Author Image

Hello — I am designing a group blog and am trying to figure out how to insert a photo in to the timestamp (which is to the left side on my blog) so that, when someone posts, their photo shows up to the left of their post. Is User Photo the right plugin for this? If so, what code do I insert (and where) in order to include a photo in the timestamp area? The blog is located at http://www.fpwatch.com

Thank you!