bring it to a pro
but if you must diy -open your ash tray, there should be a couple of screws there that you have to take out. look on either side of the console, there should be screw covers, pop them off with a screwdriver, VERY CAREFULLY SO YOU DON"T SCRATCH THE CONSOLE. Remove those screws. Hopefully, you should be able to remove the front of the console. Don't force it out. If it doesn't come out easily look for other hidden screws.
As for the metal thingies, you slide them between the car stereo and the metal box that surrounds it. Once it's in you should be able to slide the steroe out.
Two quick stereo hints before you get started. I gave you generic instructions that work for most stereos, I don't know about BOSE. Do yourself a favor a hit the crutchfield website before starting to find out about your stereo and the installation instructions for your car. Good luck.