I'm thinking of updating my computer, and I realized that when you install Civ IV, you have to enter a code found somewhere on the box or the manual. Unfortunately, I have no idea where either of these are. What should I do?

I'm thinking of updating my computer, and I realized that when you install Civ IV, you have to enter a code found somewhere on the box or the manual.

Sigh. You do not, repeat do not, require a code to install or play Civ IV.