Remove glovebox (pry black pin on LHS with flat blade inside glove box.)
Undo 2x screws on side of dash, air vent side trim (near door)
Undo 1x screw from undernieth the air vent trim down near the glovebox pivot point.
With door open use a phillips head screw driver and undo 3x (I think) screws on the very LHS of the dash holding the side air vents on.
There should be a piece of foam in behind the air vent duct. You can either leave it alone or remove it.
You should see 1x screw holding the speaker cover on. Remove this screw. You should now be able to remove the trim without removing the windscreen duct trim, but if not there are 4 screws (might be 5) that hold that trim on, but use a magnetic screw driver because they tend to fall into the vent...not good.
Do the same for the drivers side but obviously remove the fuse cover.
Hope this helps, regards Guy.
p.s. DISCLAIMER...been a while so be carefull, I might have forgotten something!