For my interview all i had in front of me were my role check list and questions i needed answering. I wasn't asked for my presentation code nor did i have on hand, so it doesn't matter if you have that or not. As long as you watched the e-presentation you're ok. No need to have anything memorized from it. Also find a nice quiet, comfortable place to have your interview. And remember to smile . Happiness is contagious, if you're constantly smiling, you'll also be able to hear from your interviewer, which will make the interview more relaxing and enjoyable.
well that's just my 2 cents. Good luck on your interview!