Customize My Thesis Blog

Customizing my blog to suit my needs. My blog is a wordpress blog with the Thesis theme. I want to keep the Thesis theme so understanding how Thesis operates will be a bonus. I have a psd (layered file) of exactly how I want it to look and I know and can explain how I want it to function. For all you web savvy programmers I am sure this project will be a like a walk in the park.