Is this impossible now?

So I recently got a laptop and I wanted to transfer photoshop elements 7 to it. I have all the disks I need, but I cant locate the original DVD sleeve that has the serial number on it. I have no idea what to do; I've been searching for it for days and it's just not anywhere. The manual even says specifically that they can't provide me with a replacement...is there any way to transfer the program from my old computer to the new one. Any advice at all would be very very helpful!