Marketpress - can all shipping details be removed except email for digital products?

Hi, I've looked through the forums and can't find this so forgive me if it has been discussed before.

I sell digital products, so all I really need from someone is their email address - I am losing a fair amount of people at the shipping details page because they see all the fields and can't be bothered.

Is there a way to get rid of this and just have the email address field?