Installing existing project as plugin

Dear Everyone,

I have 1 opensource project im very interested in. I would like to install this project as a plugin since it does not support a /theme folder to override the app views, js, stylesheets, etc. And this option won't be available since it has no priority for them. Im to new to ruby to do this myself and working on another self made project so i dont really have the time to going to build that feature in.

Would it be possible to somehow seperate views/css/js from the main app and place this in a theme folder

Any suggestions advice on this would be very welcome Thank you