largest little screw driver you have that fit in the 4 small holes on the back of the wheel cover. put it in till it stops going in, then turn the screw driver like matt is showing in his pics, it unlocks the air bag.
you will never get a large screw driver like in the pic in there lol. dont matter, the little one does the trick fine.
the trick is unlocking the first corner, then you need to pull up on that corner till the one under it is un locked. repeat for the other side.
the other issue is how the junk yard wheel is locked. if need be you can use a drill flat head extension for a driver set, the long one thats like 2 inches long, and a some vise grips or pliers to turn the driver. or one of them crazy right angle screw drivers work well too.
like this
once the air bag is off unplug the air bag and the radio controls, then bust the nut free. now you need a small 2 gear puller, lock it on make the puller tight, then hit the drive bolt with a hammer, a few god firm shots should pop it free. if it dont pop off, re tighten the puller, cause the puller bolt should be loose now, repeat the hammer blow tighten up deal till it pops off. then its yours.
while your there, have two picks or snap ring pliers and take the clock spring for a spare and the multi switch. its under the wheel. ignition harness could be snagged too real easy. just parts to "have".