Hi James, here is a few pictures of the inside of my door trims to give you an idea
to get the door trim off you need to undo 2 or 3 screws (sorry I forgoten) one is behind the door handle,
has a cover over it, and there is 1 in door handle in the bottom of the on top recess (if that makes sense)
then there are several clips around the trim, just start at a bottom corner and work your way around popping one out
at a time, now it is best to have window up but harder get up. The trim should feel loose when you have all the clips out,
then you will have to lift it directly up but don't pull it away as you will have wiring to unclip, the switches stay with the door trim.
Now for the speakers, as you can see I have Kenwood 6.5 in splits but I didn't use the tweeters as looks like to much work
and i also used most of the factory wiring. I have a built in amp and crossover so I detatched it from the
speaker (hammer became very handy) and then mounted it to the door and extended the wiring to suit.
Something also to note is that these speaker may be 6.5in but the mounts in the door is well over 7inch so I
used some 6mm wood to make a bracket/spacer (all still fits easily behind the door trim) It was a bit of a job
but the sound quality is worth it, keep in mind it just makes clearer not louder. The problem with the orginal speaker is
that the cone and foam surround sperates from the frame, apart from that they are still good speakers.