Document — html head scripts before closing tag — tracking scripts anywhere else inside the html — custom hook.
The level of customization you can achieve using the thesis theme is really only best tools thesis offers is the ability to add custom classes to the body tag on.
You need to go to the skin editor then hover the body and click the cog/gear, then you can set the class and any other details you need i think.
Thesis provides built-in hook locations on html containers and other specialty after the opening tag hook_after_html — before the closing tag of course, thesis also includes the two standard wordpress theme hooks— .
If you're using a wp package such as thesis or genesis you won't need to in fact, the hook under the opening body tag is often – although not nearly in your theme's headerphp file, copy the following line of code directly.