Thanks guys for your advice.
I went with your suggestion WPyogi and it was easier than I thought to create a ‘Child Theme’.
All I need to do now is figure out how to get the template header to appear how I want it to unless you have any pearls of wisdom for me?
Basically I want to have a logo to the left of my header and a header slide-show to the right.
Can I create a multi-column header or is it not that straightforward?
Would I need to modify style.css file in my new ‘Twenty Twelve Child’ theme folder or would I need to add a ‘header.php’ file to that folder and modify that?
Thanks again for your help.
Chris