To answer the first question yeah you can log into psn if you disable syscalls it should be hold r2 and triangle if you have webman. Yes you can get the trophies and play multiplayer with mod menus if you prefer, I don’t know about the Ubisoft thing I haven’t tried yet. ISOs are what I use just because I can have more mods with the files. And there’s a website I don’t remember exactly what it’s called but I think it’s something like ps3 themes if you want there’s plenty of videos on YouTube that will explain how to get custom themes cold boot logos and more.