I have a disc with 2 tracks and 2 sessions. I want to change nothing already written. I want to add more files and directories. Should I use Neros option 'Continue with an existing data CD (multisession)'? It asks me to select a session. If I select session 2 it then says so many files are added and replaced. I then close the window. Do I need to close session 2 before starting a new session?