mine was mounted just forward of the ash tray on my old 93 SSE. worked good cause it was thin and rectangular. If yours is an odd shape, it might not work. try the area to the left of the radio under the vent as well.

Thanks everyone for all of the suggestions. I think, for the sake of money, that I will try good 3M double sided tape, after a good cleaning with alcohol. Or, I might go with a heavy duty velcro. But, I am still considering the ash try idea, too.
Now the thing that bugs me is the display is green , and all of the other dash lights are reddish/orange. Oh well, the changer was free with the car, so what are you gonna do?
By the way, Ryan, that is a nice install on the XM display.

Thanks man, be sure to post some pics when you get your install done up.

Oh and about the different colour, the white XM display drives me nuts too. That'* actually the only reason I have a Sony deck, is because it has red numbers/buttons.