I hate to sound like a broken record, but you are retarded.
In a hard shell helmet like you have there, the eps foam is adhered to the pre-molded outer shell. The outer shell does nothing in terms of protection from impact, maybe from sharp objections (such as a tree branch) from unnecessarily compressing the foam, but has absolutely nothing to do with absorbing any type of blunt impact.
On an In Molded helmet (like most bike helmets, or ski helmets similar to Giro's G10) there is some degree or structural support from the thin net molded shell in an impact, but very little still.
In both styles of helmet, the outer shell is primarily designed to prevent the eps foam from distorting under impact, and cushioning the blow the way its supposed to.
Go read the CPSC or Snell guidelines for helmet safety standards. You'll realize how completely absurd it is to tamper with the integrity of the helmet like that, let alone use a helmet that's already been through a substantial collision.