once the cylindrical shape has been put over the model, the next thing to do is press "edit"

once this has been pressed, the following bow will apear.

the highlighted area has been turned into a square shape, meaning some polygon have been squashed and other stretched.

first i needed to have only the head (high lighted) i then pressed the small triangle next to the ID box, this removed the ear.

from here i selected Tools... Relax

from here there was 3 option, relax by face angles, edge angles and centre, each having a different effect.

to start with, i went around the top of the head and presed the "edge angles" option, and then pressed apply, this slightly rounded out the head, so that it matched the shape of my model, pressing the "apply" button several times gives a greater effect.