Customization could involve styling as well as actual php code changes required, ultimately we don't have existing tutorials or officially offer support in this area. Our themes are not encrypted though, so you are free to make modifications as you wish. There is no specific mention in the forums relating to other users installing our themes on this framework, so it's unclear how straightforward the installation would be or if its any different to that of a standard WordPress installation which our themes are specifically designed for. The demo site is set up without the use of additional plugins or modifications, so what you get when purchasing the theme is what you see on the demo (less demo data). Apart from the original purchase price and subsequent annual renewal fee, there are no other charges by AppThemes to use the theme. Thanks.