tbh, once i got the proper trim removal tools and asked everybody every question i could think of...yes trim pries off, undid 4 torx screws, slid stereo outthere was 1 big plug and 2 ariel connectors, pulled them offthe RNS510 went back in in the same way, except the 2 ariels didnt fit side by side anymore, but have since learnt that you can take the plastic off of them and they will - i just plugged the fm one back in by itself.the gps arial was just another plug and then fed the reciever block up into the dash area.done.i really mean it when I say if I can do it anyone can and a big thankyou to those that nursed me through it