Ron,
To do what you are asking, this is what I would do:
1. Lay down a black color board as a background for your credits
2. Enter the titles and select a template.
3. Input your text as required.
4. In the Title Designer click the Animation Properties tab.
5. Make sure your text object is highlight and then click on Begin Effect
6. Select Scroll Up
Now...the best way to do 100 lines is up to you. You can try and do it in several clips and try and time them perfectly. Or try and enter them all in one clip. The speed of the clip (and the speed of the credits) will be dependant on the length of the clip.
Kent H: I am not sure why you are getting those errors. Provide Dafydd with your steps and we'll see. Hope this solves your problem.