I just thought a bit more about this and stumbled across a huge problem here that I could not solve yet, at least theoretically. As far as I understand the PSN app, trophies i.e. will link the related game to the Playstation Network. Since I am running an own database of games it would be a real problem having links to another game database. Until I have no theoretical solution for linking games to the internal game database of the own site, I have to admit that I am out.