Better Documentation

Hi all, i decided to buy this product as it seams the most promising for anyone wishing to sell media online with the back-end to cover the essential customer service related tasks, but as with all things in life there are a few teething problems and some good docs would real help.. i'm currently installed on a development machine while fully testing and have a couple of questions..

first off is here a good place to post or should this kinda stuff be done via support ticket?

second what is the best way to make the document forms work with my theme?

final for now can i set an option to allow guest users to buy products and capture there email in the backend so if the email is registered the products are auto-magically assigned to the user account?

thanks.