I'm installing a radio for a friend on a 91 accord and got the Metra kit # 99-7890 which should be the right one. I'm installing a regular Pioneer head unit once used on a 01 civic. What pieces do I use and where do i connect and all that ? I have the stock one out but can seem to see a logical way of useing all the pieces. I also dont have the instructions, so if anyone knows of a site that has the instructions that would solve my problem. Thanks guys