Assuming you are referring to an SRT, the process is pretty easy:
1. Remove the screws holding the ring around the shifter.
2. Pop up the console plastic around the shifter, it's held with fasteners that simply snap when you gently pry up on the plastic.
3. Remove the allen screws holding the plastic on the dash panel. There is also a phillips screw on the bottom that is covered by the plastic panel you popped up earlier.
4. Carefully unplug the electrical connector between the HVAC controls and the car wiring harness. The connector is on the backside of the controls.
5. Carefully unplug the electrical connector behind the start button.
6. Remove the last electrical connector behind the dash panel. There are three connectors in total, and they all have something you need to depress in order to get them to release, and they are also tight so they need to be CAREFULLY removed. This is the hardest part of the whole job.
7. Remove the center plastic panel, it should be free now.
8. There are 4 phillips screws holding the radio in, remove these, and the radio will slide out. Once clear, the connectors on the back of the radio will be easy to access, just unplug them and complete the removal process.
9. Plug in the RB1, and reverse the order of disassembly to re-assemble. Don't forget to plug in the antenna, I placed mine on top of the radio once it was installed and this location seems to work fine (The dash from the radio on up is mostly plastic so it doesn't interfere with the signal.)
When re-attaching the trim ring around the shifter, be careful, it only goes one way as there are two location pins of differernt sizes, and they need to line up with the shift boot & releif holes in the console piece.
All done, it should take you about an hour.
Regards,
Mike Dolan