I know this is asked a lot, but I'm trying to install custom audio in my 98 sable. I've got everything I need, but I'm not used to installing audio in modern cars. So, before I mess something up I'd like to ask a couple of things. I'm installing my own amp, so, this would mean I do not even need the stock one, or the 18ft. wiring harness that scosche provided, correct? If I don't need it, wouldn't it just be a "standard" installation, with all the sub/speaker wires going to it then up the the head unit? Then the only scosche thing I need would be defrost,climate, right?