I'm in the process of changing out my 2001 MDX radio and I think the 2002 is identical in this regard.
It was pretty easy. I found the pictures/link posted above helpful but did deviate a bit from these instructions.
I have the 2001 Acura MDX Service Manual and it recommends a different procedure for removing the artificial wood panel around the radio to enable the nav/radio to be remove. I decided to follow the service manual approach based on a recommendation from a good Acura service consultant. Apparently he has seen quite a few MDX's come into the shop needing replacement wood panels because they often crack when people are trying to pry them off. Its a pretty expensive piece because it has the integrated switches, AC controls and screen, etc. Once you get it off you can easily see how it could be cracked by prying since the middle plastic areas are pretty thin, flex in a scary way, and the clips can sometimes be tough to break loose.
Anyway, the service manual approach worked fine. Basically you reach under the ash tray area and pop off a piece of trim by pulling it toward you. It has 4 clips and just pulls off. Although it can take some force to pull it out.
Then you remove the not an ash tray and remove 4 screws holding the tray/power socket and lower it down.
This allows you to reach up under the wood panel and easily disengage the ~3 clips from the inside bottom instead of prying from the outside or pushing from the top inside by the AC vents. Be sure to reach far enough up inside to reach the wood panel. There are some lower features inside that almost feel like the clips but are not. When you find the right ones, you will know.
All parts of this process were really easy and felt 100% with no risk of breaking anything except maybe the very first part. I had to pull pretty hard to get the initial lower trim panel to pop off.
Overall I liked this approach better because it felt low risk and was the documented intended removal approach of the engineers who designed the MDX.
But I know a lot of people have successfully used the coat hanger AC vent method. Just be careful!
Note that separating the stock radio from the nav and replacing it with a double DIN from Kenwood was trivial. It fit perfectly!
Except for the faceplate. Apparently nobody makes an MDX double DIN faceplate except some guy on ebay who wants ~$100 for it! Kenwood supplies one that you can cut to shape and I may try that. If you find a great solution to the faceplate adapter problem, please let me know!