Customise %Author% Page

Hi

Its me again, you might remember me from the Sidebar link decoration thread here.

Recently, I added a link to %author% in my byline which takes guests to a page with every post by that author.

What I would like to do is customise said Author Page with an image, a link to the authors external website, and some text then followed by that authors posts. Is this something that is possible with this theme?

Thanks for reading

Stretchy
mymatestretchy.com (not safe for work)