Wow! Great to hear that you are working on a new download module. I hope it will be like RMDownloads. That was almost perfect for my needs. Just a few bugs with titles and ratings and stuff.
Some things I liked with RMDownloads was that you could have a screenshot/image that was loading using ajax when you hold mouse over a title. And you could sort the downloads etc.
I hope these features will be in D-Transport too ;) Two more feature requests: Have the ability to have more than one screenshot for each download. And make so you can create links to other sites.
I saw you have uploaded a video of D-Transport in action on Youtube. I don't understand Spanish, but the module looks really promising. It would be nice to see how it looks on the user side too. I think you forgot to show that in the video.