Did I just Reistall Mac OS X?

I put the install CD in with the intention of looking at the repair utilities that are on it, but did not see them. I opened the black X icon, and it had a button to restart.

I thought perhaps that this utilities menu was only available upon booting from CD, so instead of doing this manunally, I clicked the restart button, and now it appears that my OS has been reinstalled. Is this the case?

I can’t eject the CD, and… It’s asking my to choose a language.