Make Weblog Title “Invisible” (replace with linked header image)

I’m learning how to customize WP2, using Kubrick as my starting point. What I’d like to do is essentially make the text of the weblog title invisible and make the entire header image the clickable link used by the weblog title. That is, I don’t want to lose the functionality of clicking on the Weblog Title, and would like to give it to either the entire header image, or an image on the header.