Yeah, I'm still in the process of it. But here is the lowdown:
First off, you can take it and use it currently without modifying anything, but you lose Steering wheel controls and dimming on the ECC. You can however, re-arrange the wires in the connector for the steering wheel controls to get them to work. To get the ECC dimming, you need a 94 ECC head unit as it has dimming built in. You'll also need to modify the harness to it if you want to be able to use the self diagnositic functions still.
I am still working on it like I said, but have stopped cause the car is away for the winter. I am going to try and make a jumper for the radio stuff without the ECC stuff while here and see how it comes out. If I get to it, I'll post pictures.
2007 Saturn Aura XR | 1970 Chevy Blazer 4x4 | 1970 GMC 3/4 Suburban 4x4