definitely get rid of the center caps and see if you can find a replacement or modify the lugs as was mentioned above.
to tell you the truth, I don't even think the rims look that good on the contour, but that's just cuz I see them here every day:
[img]
http://www.geocities.com/succy.geo/P4070017.txt[/img]
[img]
http://www.geocities.com/succy.geo/P4070015.txt[/img]
and can't imagine them anywhere else but on a coug.