The PQRE CD is the same DriveImage7 CD that came in the box and that you installed from.
Just boot from it and be ready to hit any key when invited to start the PQRE. If you miss the prompt, your regular o/s will be booted, so be alert.
If you are going to load extra drivers (don't worry about this unless the software complains that it needs some), be sure to hit F6 at that initial prompt (even though it says "any key").
Best regards.