We just installed this gauge on Adam's Ion a couple of days ago.
First off you'll need to lengthen the wires since they won't reach to where they need to go(or at least as far as where the directions that came with the gauge say). The ground wire(black/red wire)for the gauge lighting doesn't though since you can just ground it to the A-pillar post. The power wire(red wire with the inline glass fuse)can be ran to gray wire of the hazard switch. And the gauge lighting should dim with the dimmer. To get to the hazard switch wiring just pull on the trim it's on. Should pull right off.
As for the O2 wiring we wired the red power wire to a key on only power source. Used a inline fuse plug-in in fuse F14, the power sunroof fuse I believe(which Adam doesn't have, yet there was a fuse sitting there as if it did).
Then ran the black ground and green source wire through the firewall. Use this guide for routing through the firewall.
How To Run Wires from Engine to Cockpit and Boost Gauge Install
Run the two wires to the front O2 sensor. Use the supplied scotts lock to attach the green source wire to the purple wire on the wiring harness side of the O2 connector. Use the bolt that holds the connector support of the O2 wiring for the engine ground.
It works just fine, but it's going to be jumping all over the place. Bascially pretty much useless. But I believe there's a product that will turn a NB gauge into a WB gauge I think, just remember seeing something along those lines somewhere. So it may be possible to make it useful later on.
I'd have pics of the Faze Boost and A/F gauges after the completed install to show you but I left my camera in Adam's car.
Anyways, hope that helps.
EDIT:
Pics:
Day.
Night.
From driver's view.