Hi Frankie710, if it's the same as my old one...
Switch on the ignition, CODE should be displayed,
If you have buttons numbered 1-6 on your radio, push button 1 a few times and you will see the first number change, push button two a few times, same thing happens. So to enter code 3452 for example, you press 1.1.1 2.2.2.2. 3.3.3.3.3. 4.4.
I think you then press button 5 to enter, not entirely sure. Please let me know if this helps,
Simon.
Friendly Simon., March 2008