I had the same problem, and still do at times, but have fix it to an acceptable standar. follow these steps if you cant render or create a disc.

1. Once you finish editing, save the project.
2. Delete Auxillary files
3. Restart computer
4. Remove any unneccessry program from memory, virus programs, video programs, photo, printing, scanning, anything you dont need.
5. Turn off auto updater on win xp, and windows xp updates, and any other autoupdate you have on your system.
6. start pinnacle
7. Open your project and wait a few seconds for it to laod everything in the project.
8. Render

should be successful more times than not.

If the above doesnt work for you, then I wouldnt waste too much more time on it.

BTW this works best on version 9.3, the latest version has major problems and it's less successful.

Hope it helps you guys out there.