Lost my install code!!!

A few years ago I bought a software pack, 5 need for speed games installed them no problems. When our system got so buggy we had to reinstall the OS I tried to reinstall the games and most worked except for one. To install I need a code in the following format(XXXX-XXXX-XXXX-XXXX).I have lost the cd's case and both copies of the code. I have searched the internet for about an hour and I cant find anything for free that will help. I tried looking at the cd's contents and found this,ProductGuiID={76F4DD9B-C246-4BE0-00B6-3DE9ABF72299}
I'm at the end of my rope and dont know what to do can someone help?