As the title want to make the " Last Post " Coloum a wider % but cant find the code for this i've tried hightlighting and looking at source etc but to no avail is it a template edit ?
To find the template - vboptions > General Settings > Add Template Name in HTML Comments > set to Yes . Then go back to your page and view the source code and you will see the name of the template called around your part of the code.