First off I would like to thank everyone that has contibuted to this topic. I have a Z120 and am running the update from Pioneer last August, 2.003 i belive. (Unit is at home and I am at work) I want to install the US CNSD-210FM this weekend and have downloaded it and the 2.004 hacked files. I have been reading all the posts here and am still not clear if I am correct on how to upgrade my Z120. Is it as simple as replacing the two files in SD1 with the files in 2.004 then installing SD1 then SD2 as I allready am updated to 2.003? Or do I have to start with AVICZ110BT?