Found this on YOOOOtube too
hope its not a repost :S
How To Change The Welcome Screen Text in Civic(8th Gen):
This video will show you how to change the "Welcome" on your radio screen of your Honda Civic (8th Generation)
Steps:
Step One- Turn the car to the "on" position. The engine does not have to be running.
Step Two- Turn the radio off.
Step Three- Push the "Power" and the "Tune" Buttons at the same time.
Step Four- Use the "Seek" buttons to change letter position and use the "Tune Knob" to change the letter or number.
//youtu.be/http://www.youtube.com/watch?v=tOCrmf3Tjm4&feature=related