here's how to add an eject button found on macworld.com
Adding an Eject Icon
The prescribed way to eject a CD or DVD is to press the eject (or F12) key on your keyboard. That's not much help if you have a non-Apple keyboard, if you have more than one drive capable of ejecting, or if, in a fit of troubleshooting, you find yourself without a keyboard altogether. Fortunately, there's a secret way to do the same thing: install the Eject menulet.
To find the installer, go to the root of your hard drive and open System: Library: CoreServices: Menu Extras. Inside that window, double-click on the icon called Eject.menu.
Now look at your menu bar, and you'll find the new Eject icon. Use it as a menu and choose the drive you'd like to eject.
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Matt