Removing the door panels involves removing two screws( one behind the door handle, just remove the small panel with something sharp, knife or small flat screw driver. Second is in the arm rest little cubby hole/handle lift cover to reveal screw. This is the same for all doors) then firmly pull and lift the panel off. Remove door opening cable and window motor cables which just unplug. Takes a couple minutes per door. Fitting the speakers you will need to remove the old speaker , one screw, and unplug the wiring.
Fit the new speakers into the new bracket, splice onto the wiring, insert and screw the speaker into the door.
The brackets are the insignia, Meriva, Astra 2010 onwards speaker brackets. Around £10 a set.
But to be honest I would recommend applying sound deadening first as it improves your sound drastically and makes the car a little quieter.
This is the sound deadening kit I used. I think it is a real bargain for what you get at around £12 on eBay. This is not always available though so you may have to look around for it. You would need 1 kit per door, I could have used an extra 4 sheets of the deadening sheets to have a better finish.
I couldn't compare this to Dynamat or any other products as this is the first time I have used sound deadening products.
www.silentcoat.co.uk/vibration-damping/silent-coat-starter-set
I will try post a few pics, not very good ones as I couldn't see my phone screen in the sunlight
This is the front interior door panel, I did both inside, outside and sound damping around the speaker on the door card Edited by: Redbul50