All you have to do is insert your website's title, keywords, and description right into the software.  Click "Build" and you have a ready to go html template! You can try different combinations to see which pages are getting the best results. Once you find a winner(s), you can customize and tweak it even further! 

There's no limit to the number of doorway pages you can create - stick to about 25 pages with relevant key words and description.

Doorway pages may help you to get more visitors by increasing your link presence on the web, but you may have to make the pages rich in content with contextual text to make it interesting for web visitors and search engines to rank them. Do not make too many doorway pages to over populate or dilute your websites relevance.