I want the co.uk to point to the same folder on the same server as the .com did. Will that present a problem?
You want the .com domain to point 301 to the .co.uk domain.
If the websites are the same this is all you need to do. You want the .com to point to the folders on the .co.uk but as I said if the sites are the same just a domain 301 is all you will need to do all the indexed url's will go to the correct page and Google will replace them with the .co.uk domain ending.
If there are different folders then you need to create them on the .co.uk domain to reflect the folders on the .com domain.
I would then begin a link campaign for the .co.uk website.