Sean's input to the writing process

[PaulTMA]

As we all know, originally the credits ran - words: Nicky and Richey, music: James and Sean. Obviously the balance has never been 100% evenly split at any point in their career, but what I'd like to know more about is what Sean's input has been to the music, as it's often widely assumed (and I often make the mistake myself) that James is responsible for all of the music. I know 'Welcome To The Dead Zone' is a Sean song, but can anyone with more knowledge enlighten me, citing specific examples if possible? I know his voice is on Solitude Sometimes Is, I don't know if that's an example though.