Thanks for your reply, however it looks like I was over looking what needed to be done. It can be done using the 'Table rate' shipping. All you need to do is upload a CSV of the shipping rules you would like to apply.
More info can be found here - http://www.magentocommerce.com/knowledge-base/entry/how-do-i-set-up-table-rate-shipping
Hope someone finds this handy..