Document Downloads

I am using a plugin called WP-Filebase to adminster product datasheets and other documents on our company test website. This software allows us to limit permissions on users on who can or can not download these docs.

We want people to either register for the site or have to at least enter there name and email to download the datasheets. Currently the file shows and if the unregistered user click it it says access denied. Is it possible to not show the filename but to say register to see available downloads ??

On this test product page click the Documentation tab and you will see the link.

http://www.blccsonline.co.uk/product/debris-netting/

Any ideas are welcome.