This is a re-install and I can't eject the installation disc. Only after I had inserted it into the superdrive and run it, did I realize that I should have used the snow leopard disc, as that is the latest OS I have on my computer. How can I eject the disc? "Eject" doesn't work because it says I need to close open programs, and the only open program is the disc and I have no idea how to close it. When I turn off the computer, I still can't eject the disc. Jean