Good luck with a Volvo S60R install. Yeah, I read that guy's V70 ICE install documentation and I must say it's insane. It's too bad they don't make 'em like they did in 2000. My 2000 V70 install was probably the easiest thing my installer had ever done... ever.

Keep an eye on Crutchfield for a wiring harness. With that, all you'll need is the custom facia. If you ask me, you should try to shove an empeg and a second HU in there (for radio and CD). Hey, you've got the space, right? If you're not worried about the car's resale value (which i'm sure you are), just hack some mounting brackets into it to accomodate the double din opening you'll hack into the single din facia.

Good luck and please post pics!