passenger side: remove the vent by fitting a small flathead in the top and push down to make a small gap, then stick it in the side and prise it off the mountings then with a bit of fiddling it should come out. Then u have to remove the glovebox by removing the 5 retaining screws, 2 on the bottom, 1 inside the glovebox and 2 at the top (with the cover open) then you should see the 3 screws holding the housing in place, 2 behind the vent and one where the corner of the lovebox is.
Driver side: remove the vent like above, then remove the fuse box cover to expose the 2 screws at the bottom, remove them and the 2 behind the vent and there u have it.