I've done quite a bit of video editing and all i can tell you is that I have always used Adobe After Effects to create scrolling text. I am not familiar with Premiere as I generally use Final Cut Pro on a Mac or an AVID suite when I can get access to one.
I f you can afford it, and plan to do a decent bit of editing I would pick up After Effects as it is a really powerful tool for creating all sorts of effects for video.