.. How do I get through the script correctly?

You'll find a copy of the script in Frank's apartment.

How do I find Frank's apartment?

Once Joey has looked at the script and told Rosa about it, she'll have a copy of the relevant page in her inventory. Handy, if a bit improbable.

Unfortunately, the conversational options you get to choose from don't match those lines exactly. You're going to need to extrapolate (i.e., guess) for some of them.

The correct choices are:

Frank: I knew you'd come.
Rosa: Ask how he knew. (Rosa says, "How did you know I'd come?")

F: I know you, Yvonne. Perhaps too well.
R: Tell him he's dead. (Rosa says, "Listen. I have to tell you something.")

F: Come on. The boat's going to leave any moment.
R: You're not going. (Rosa says, "I'm not going.")

F: Not going? What do you mean, you're not going?
R: Repeat yourself. (Rosa says, "I said I'm not going.")

F: You're staying?
R: Tom. (Rosa says, "Yes. I'm staying here with Tom.")

There's more, but Rosa takes care of it herself. When you've finished with the scene, have Rosa talk to Frank again to help him move on.

Who was that old woman ghost?