How can I put a lot of mp3 music onto a CD?

When I burn music or audio using WMP, I can only fit about 80 minutes of music or audio files onto the CD. This music is usually mp3 music or audio I have downloaded from the internet. Yet, recently, I bought a mp3 CD that has approximately 5 hours of music on it. When I saved the contents onto my computer, I saw that WMP lists about 4 separate albums on this one CD. How can I put 5 hours of music onto a CD? Do I need special software? Can I somehow program WMP to do this? I don't understand why I can only burn 80 minutes of music (downloaded as mp3) using WMP, and yet this CD I purchased is crammed full of over 5 hours of music! Thanks for your help.