can i downgrade my psp 2.0 to 1.0 ?

i bought my psp and it was 1.52 and i upgrade it to 2.0. i know how to downgrade it to 1.5 but many homwbrew software is still only for 1.0 so i want makin it 1.0. does a way exists to make ist ?



sry 4 my bad english !!!