Hey mate,
To install the rear speakers, you need to do the following:
1) Remove rear seat completely
2) Remove one side of the internal trims
3) Remove rear parcel shelf
4) Remove the child harness brackets
5) Remove rear speakers
6) Refit everything...
Sounds simple right? Took us a good few hours
I've been really busy lately, will try to get that write up on my site soon ~ sorry about the wait. Hope this helps!
Just don't be lazy and force the parcel shelf, quite fragile i think...