Everett when you import tracks into the CD burner to be burned you can normalise them to 0db so all tracks sound recorded at same level. Some burning programs offer this feature....not sure if the program you use has this function. You may remember some while back me spouting off about Nero being an all singing and dancing multi media progam well this is one thing it does automatically if you tick the box marked normalise before burning. Maybe about time you invested a few bucks...it is on ebay for under 10$ and does loads more than playing CDs/DVDs, burning, photo editing etc etc, and creating great CD covers. But worth checking if the burner you use has a normalise feature.

Failing that as a labourious task you could import individual tracks into Audacity select all and then go to effect then hit normalise 0db that would work.