1. Remove bottom 'skirt'. Just choose any part and pull. Better to pull a bit at a time, pulling from different sections of the skirt.
2. At the brow section, gently pull the 'skull cap' lining. It is held in position by two press-stud type fasteners. Do the same at the back-of-neck area and remove the liner.
3. The lining in the ear'ole sections is permanently attached but has an L-shaped Velcro opening which will reveal the cutouts in the polystyrene into which the speakers fit. Well, they kind of fit.
4. Re-fitting is the reverse of removal. You will find that fitting the bottom skirt is rather tricky so take your time.
Hope this helps. I figured it out myself so it can't be that hard