No, this is one of the limitations, you can only use ready made ones. But maybe you could get to grips with esprit, and when you feel too limited, buy the Ecosystem and/or Ecopainter modules. Vue has a modular approach for its Artists line. Bear in mind, though that there is no upgrade path from a product from the Artists line to the Pro line. Once you are using Complete (when you have all the modules), you're stuck with it. Can't go Infinite. (Well, you can by arrangment with e-on, but it's pricey)