Over the weekend was able to add the styles dropdown manually by changing the exisiting array on the contents_insert.php and contents_update.php pages as below.
change - array( 'Format','Font','FontSize'), to - array( 'Styles','Format','Font','FontSize'),
Am I correct in assuming that I can also manually add new styles to this dropdown by adding them in the format below to the default.js file in the plugins/styles/styles folder
{name:'Blue Title',element:'h3',styles:{color:'Blue'}}