Small ayout changes with bootstraps 2.x

Hi, I have following simplified structure (on a responsive site with bootstraps 2.x): <div class="span12"> <div class="span4"> <image /> </div> <div class="span8"> <-- some text --> <a>button</a> </div> </div> ----------------- 1) I want the image to be Vertical centered in the middle. 2) The height of the span8 is not fixed, some span8 has 200px height, some has 150 px height, some has 123px height. So please align the button to the bottom of the span8. ------------------ So I need a bootstraps 2.x coder/designer, who can do this for me. Im avaiable now :-) Pls write "bootstraps 2 layout" in front of your comment, or I wont read it, thanks.