Black and white theme: How to add another tab to product description

[Lucas-911]

Hi all,

I am currently developing a prestashop site using the 'Black and White' theme. I am currently trying to add a new tab to the product description! You can add text/images etc via admin, but it only allows you to add into one tab and not another!

http://www.bikedirty.co.uk/shop/prestashop/product.php?id_product=10

Can anyone suggest if i need a module to edit these settings or do i have to access the tpl files to make adjustments??

Thank you

Luke Allsebrook