Gumpy, just lifted the speaker grill off to allow access and pulled the bottom of the door off the little plastic clips. Then 3 screws , 2 off which you can unscrew with a screwdriver and the lower one I used a 10mm ratchet as the screws have a hex head 10mm. Then disconnect the white cable clip on top and carefully pass the speaker between the door frame and door skin, ie out the bottom of the door. I cut the old ones out with cable cutters to leave just the out frame. Remove the white cable mount. The new speaker then mounted onto the ring with just 3 screws. Then make a short cable link up to allow you to attach to the speaker and then cable out of the hole in the top of the frame (where the white bit was). You can then re mount the speaker the same way it came out and use the link wire and 2 bullet connectors to reconnect the speaker. No have not upgraded the cable. Can see no need . Sounds great as is. New pioneer head unit going into tomorrow. But not sure how to access the rears for their upgrade.
Hope that makes some sense. If not message me for any help....