Even easier then what Tony posted.

Step 1. Download jEmplode from the link at the top
Step 2 (optional but recommended). Move jEmplode to the Applications folder
Step 3. Double click jEmplode

You now have installed a program in one of the normal Mac ways, drag and drop. Since Java is built in and updated as part of the system, no need to visit Java.com to download it.

Oh, keep in mind iTunes defaults ripping to AAC (MPEG 4 Audio), and the empeg won't play them. Make sure to change it to MP3 if you plan to use it to rip CDs. You will find the Setting under iTunes (menu entry) Preferences, then Import Settings.