easy, in your profaili under your picha there is an uption in blue that says "upload photos" click in that and then pakia the picha wewe want! down it says: "make this imagen my icon" au something like that, click in the little square and then click in "submit imagen" and tadah! wewe have that as an ikoni ;)
Very easy!Just click pakia pictures on your profile. Then, look for the name of your icon. Then, check the box that say "make this picture my profaili picture".Then, cick "upload picture". Then, wait for it upload. Then TADA! There it is!