PC, Wii, Xbox or PS2/3? If it's a Wii, forget it there are rarely any configuration options for games. I doubt other flavors will have any other options either.
In any case, the easiest (albeit lamest) way would be to just record it using software (such as Fraps) or a video camera to play back to your hearts content. ;) Alternately, you could perhaps muster searching powers (better than my own failed attempts) to find a webpage with the texts already written down?
To note, according to the LEGO Star Wars: The Complete Saga Wikia entry, there are 6 chapters and 6 episodes, so there's only 36 rolling texts to read. Enjoy! ;)