Analysis of open source project

I would like an analysis of the [login to view URL] codebase, What I would like to know : We have our own website which has certain features, I'm wondering how I could integrate the apps into our website. We're experienced in Java, html and php. Would like to know if we could get any easy wins in integrating the apps there, while keeping our own branding and our existing features. How could it be done? What are the technical problems with doing it? Perhaps this has to be done by proxying certain apps? Or linking them in some special way. We need an analysis so we know how it could be done, based on the analysis of the codebase/usage.