some discussions here on apug have touched upon this sort of thing. what i have read ( here )
it is done by steaming the film in a bath of hydrogen peroxide ( H2O2 ) either before or after exposure
and then developed "normally"... ( whatever that means since my normal is different from ... yours for example )
i have never done this so i can't say how useful it is, or the correct mechanics of it all ... and i don't know if anyone has "charted the curve"
i hope you post the results of your over exposed film ... 7 pages is a long wait