There are screws either side of the centre console that are hidden by the front seats, you will need to move the seats back and forward to see them, one of them each side you prob need a right angled screw driver, there also screws behind the cup holder at the rear of the console, I think you may have to remove screws at the sides further tward the gear leavers, so in other words you will need to remove the centre console.
The CD changer is held in with four screws/bolts, be careful when working around the cooler it's self, don't damage the pipe work or the cooler coil. Very expensive if you slip with a driver.
I have not done this job my self, but I have just had a look at mine, so there could be more steps involved, I don't think it will be a difficult job but might be a little time consuming.
Hope this will be a little help,
Good Luck.