Yep no problem.
First, take off the flexible rubber bit on the inside, used to adjust the mirror. Beneath this should be a metal ring screwed on, unscrew this.
Next, take off the plastic section that is behind this, housing the small tweeter speaker. You will have to remove a small screw cover near the front bottom corner, the screw holding it on is behind this. The rest of the section is held on with clips, so take care when removing.
Once you have this section undone it should come away past the mirror adjusting mechanism. Easier if you leave the speaker housed inside attached, removing it is not essential.
Right, now the tricky bit! You should now see where the wingmirror is connected. It is held on by essentially what is a large plastic nut, there are 4 'L' shaped grooves in it. The easiest way to undo this (i found) is to use a flathead screwdriver and a hammer. The bolt unscrews anticlockwise, so angle the screwdriver in this direction resting inside one of the grooves, and using the hammer, bash at the screwdriver to rotate the bolt. Once this is off, you should find that the wingmirror comes off easily.
Hope that was of help
