I have an Intel iMac (early 2006) and I forgot the password. It was originally run on Tiger and then I upgraded to Leopard. I put in the install disk for Tiger, restarted the computer (pressing C) and it just ended up at the login window as I was told to use the original install disk. Now I'm concerned that I won't be able to eject the Tiger disk in case I need to use the Leopard one. What do I do? (I'm on a different computer in my home but it's not as good).