Hey their sh10792,
Ill just chime in real quick. I'm running Rockford Fosgate X162S 6-1/2" 2-way Components in the front doors with the tweets in the stock locations and each crossover hidden inside the left side of my dash.
As for the Crossovers, their is good room to fit up somewhere under the steering wheel behind the lower dash panel, or even behind the kick plate on the side of the floorboard of your ride, or if you are running your wires down the passenger side, then you could easily mount both crossovers in the glove box. Here is a quick pic of where I'm talking about.
As for the replacing the cheap little dash speakers, they are extremely thin and are a pain to find something to fit into the stock locations without going ahead and modifying the dash to some degree unfortunately. Here are what they look like.
(I think those last two pic's are Dusters Pic's but not 10% sure. If so, thank you sir!)
Anyways, you pretty much can go one of three ways for the most part.
1. Do like Duster did with his sweet looking custom dash, and tweeter set up . He actually has an amazing write up on how to perform that mod from the ground up, which you have probably already checked out.
2. You could be extremely careful, and slowly cut down into the plastic part of the dash to make clearance for the tweets so they mount flush.
3. Best, and safest bet would be to either do away with dash speakers, or just don't mess with them, and go with mounting your tweets up in the mirror sail trim.
Another very cool place to mount the Tweets, and is perfect for center staging and sound would be behind the center vents out of view. Of course you might lose much of the air flow out of those vents, which you will have to figure in, but at least if gives you some more ideas to kick around anyways.
Go easy, and please be sure to let us know what you what you wind up doing.
Go easy,
Candyman