having trouble installing os x

I just received a used mac (I think g4; it is silver with curved transparent handles at each corner) and I'm trying to install os x on it. I used the disc that came with my laptop, however I get the same error message every time. After I select the language, it says "software cannot be installed on this computer". I was told this is because Leopard for a macbook won't install on an old g4. Is that true?

Also, I can't get my CD out of the drive now since it uses it to boot everytime it restarts. Any ideas?

Thanks
David

Why must we answer this question 15 times a day...

You cannot use a grey restore disc to install OS X on a machine that the disc did not come with. You must use a retail (black) OS X install disc.

thank you.... do you have a suggestion as to how to get my CD out of the drive?

Try holding down the mouse button when your computer restarts.

...or press the F12 key on your keyboard if it's not an Apple keyboard.