Vista - Media player help

This is a small item but if anyone can help I would appreciate it. I have an
audio book collection and I am transfering them to my MP3 player. I use my
Creative Zen Explorer to RIP the audio CD's onto either my PC or the MP3
player. However, every single time I put an audio cd into the CD drive ,
Media player immediately launches and starts to play the CD. Even if I
minimize it after the first CD is entered, when I put in CD #2, #3, etc.
media player imediately restores itself to full screen and begins to play the
cd. Is there some way I can stop this from happening. I would like to
launch media player only when I need it. Thanks.