Changing the confirmation page details

I'm trying to change marketpress to fit our needs which is basically only "selling" downloadable products with cubepoints.

We also only show the products for logged in users so I edited the code to skip shipping checkout steps and go directly to confirm-checkout step from the cart.

Now what I couldn't do or find where do I do it is changing the confirmation page as well as email confirmation.

As there is never shipping or card payments involved nor do I need the order status page I just want to show the following in the confirmation page:
[some thank you note]
[the download links for the products purchased]

In the email confirmation sent to the customer I just want to show the same (some text and download links to product purchased)

Anyone can help me to the right direction?