How can I find the serial number from CS4 for my mac? I remembered it being on the box, but now I can't find it, and they website I thought to have registered it to doesn't recognize the e-mail I would have used then I got it.

I don't know if this is the right place to ask this, but the website recommend I ask here. I bought the CS4 when I bought my macbook pro in when I was in college. I remember there being 2 serial numbers, so I could install to one other computer. That macbook pro finally died, and now I have a new mac which I am trying to re-install the creative suite on, only I can't find the serial number.  The two stickers on the back of the CS4 box (which i thought were the serial numbers) don't look like that they're asking for, and the website listed on the inside of the box for me to register to doesn't recognize my e-mail (which hasn't changed since buying CS4).  Any idea where I could find the serial number?