I have not worked in any kind of integration of project. But currently in which I work there would be the integration of other one which would be conducted in few months. I am making all my efforts to separate both the projects. I am making a worksheet kind of thing where everything which I did for the first project will be saved. This would be helpful for the future projects. Keeping log of the events would be a better one too. This forum would help me in successful separation of it.