Okay, so my last question has led me to another question: is there any way to import or export a timeline sequence, or any kind of workaround? I'd like to get my project into a new one with different settings (so I'll also ask if there is any way to change project settings after you've started). Thanks!
Technically, you can't change settings in a project once it's been started. However, some people have successfully "hacked" into the .prel project file and gotten it to work. I don't recommend it.
Another option is to use a program like ClipMate to cut your video from one project and paste it into a new project.
Okay, thanks. I didn't succeed with clipmate at first and had to find another workaround (downloading a trial of Premiere Pro and importing the project into that program). When I found the instructions for clipmate, I had already gone ahead with the CS5 trial. But for anyone else reading, here's a link to the instructions I found with Clipmate: