If you are looking how to include digital downloads in your site, have a look at http://www.web-store-buddy.com/

It integrates really well and is not expensive. It will handle files up to 100Mb. I am using it on my site at http://brain-power.co.uk (still in the embryo stage!) but it is quite easy to do. You can set it up of paypal, credit card off line, bank transfer etc.

Highly recommended!

PS I have no commercial involvement with the authors - I am just posting it here as there does not seem to be a websiteX5 solution at the moment.

Duncan