Thanks for your help.
I'm trying to go down the route of static options as the same options will apply to every product... I've added the drop down and the extra eCart column etc but whenever I add anything to eCart I just get a blank page...
I've turned on error reporting but the line in code it's referring to doesn't correspond to what I've added...
Can you have a look please - files attached
Live link: http://www.chandlerguitars.co.uk/preview/product_Detail.php?ItemID=4550