I think that would be awesome...
1-precondition, you must leave the latches open on the top, which isn't so bad if your parked in an area which is safe. Imagine walking to your car....you take out the remote, press a button, doors open, windows lower, and the top slowly drops....
Ok...I dont know how to do it, but I know it can be done, if we can tap into the wiring, which I do not have information on...but since this is the electronics forum, I hope someone does.
Andre

 

doesn't make much sense to me. If you feel safe enough to leave the latches open, you should feel safe enough to leave the top down. If you're that concerned with people reaching in, get the proximity sensor for your alarm.

David

 

This is just to make it look cool when you are walking to your car, press button, everything happens.
Andre

 

I agree it would look cool, but the car would look weird with the latches undone...

 

You can have it done. I want to install the Alpine 8063 w/ a power window module w/ top down also. Cost-- $200.00 extra. Problem is the 8063 has been discontinued. I'm still looking into it. I had a similar function on my 1995 Eclipse GSX w/ power windows and sunroof up/ down. close. from Avital. Never had a problem! It is cool, though

 

My Maxima will do that. The remote allows you to roll the two front windows down. It really shocks people when you do it.