Opel Astra CAR400 tape to GLCD please Help

Hello;
Firstly, sorry to bother you.
I read article here, I need your help on this issue,
http://forum.arduino.cc/index.php?PHPSESSID=j48vf7b69h00o1e9vj7ps4dnp7&topic=78634.45

I think, you have send data to the TID from the Arduino.
I want to do now, the data from the tape (audio, radio frequency, etc.) using standart GLCD want to show. How can I make it. I want to use GLCD because MID broke down smiley-sad and very expensive.

For example, How do you read data from the tape using the Arduino . Could you give an example?

I apologize for my bad english.

Please help me =(