Yes, if you upgrade to the 60MP disks you need to do a mod on the circuit board on the inside of your unit. You should have some experience with soldering to do this but it isn't too hard. Nobody is going to give you exact instructions word for word but I used this thread to get me through it: http://www.avic411.com/forum/viewtopic.php?p=733#733
and this specific post in the thread had the picture of what you want to solder: http://www.avic411.com/forum/viewtopic.php?p=4330#4330
Make sure you read through the entire thread a few times before you try it. But it definately helps with