You gonna cut a hole in the door, or try to put them under the stock "grille"?
I've played around a good bit with positioning with my mids in my doors, and kept comingup with putting them ultimately on the kickpanel right near the door. The bonus of this is that you can keep your XO's out of the doors, and then not have to worry about the constant opening and slamming stresses that they'll have to withstand from their mounting, as well as possible moisture, etc.
You might wanna try some 2-sided tape and just alot of moving them around once you get them. I obviously never got toofar witht his setups seeingas my mids only lasted me 2days, but the majority of that time was spent moving the tweets allover the place, and this spot, to me truely sounded the best, atleast with the speaker setup I had (eDi's, which suck, but are similar to CDT's)
I guess it all depends on what you wanna do with your amp, but mine being under-seat, I just found room under there aswell for the crossovers.