Custom fields in Refinery CMS

Question

How do you add custom fields in Refinery CMS? That is, I would like to extend the basic page model to include a bunch of other stuff, like screenshots, publisher name, category,

Answer 1

Have a look at the (excellent) Getting Started with Refinery guide. In Section 6 the guide lays out how to add extra fields - in the example date, picture and blurb - using engines:

http://refinerycms.com/guides/getting-started-with-refinery#extending-refinery-with-your-first-engine