I was trying to remove my infinity radio to add an FM antenna modual but cannot get the deck out of the dash. I went to a stereo shop and they used their keys and it still wouldn't come out. One side would work with the key and the other side he said the spring had already been released. Is there any way I can get the one spring "unreleased" so that I can pull out this deck? Also, is there a picture of the back of the radio that shows what is attached and what it does? HELP!!!!