Your luck at fitting 6x9's in a Contour will depend on the brand of 6x9. The best were the green Infinity Kappas as they came with a spacer ring, I understand the current model does not. You may have to trim the door handle bracket in the rear though.
, i got some Pioneer 3 way 6x9's from my old car. was wantin to put em in. it says all ya gotta do is drill holes to mount it to. hopefully thats all i gotta do 