Contour Enthusiasts Group Archives Forums Modifications Audio Installing another factory head unit

I want to install a CD factory head unit and take out my cassette factory head unit.

The Ford Service Manual I have on CD for the 98 Contour says that I have to enter a radio key code into the new unit for it to work. I don't have the code.

Is this for real? If so, where can I get the code? Bought both car (with cassette unit) and CD factory head unit used.

I realize most install aftermarket head units, but I want to spend my money on speakers first, and I don't really need high power (however, I bet many of you on this forum will disagree with me on that statement... )