does this firmware downgrade completely erase the 2.0 prx's and updates and rewrite the flash with 1.5? that doesn't make sense to me as the graphics for the os are still there when upgrading/downgrading. logically, the prx drivers have to still be there to display these graphics...SOMEWHERE. so are the files from the 2.0 update still there and just not used? or are they gone completely after downgrading? sorry for the rambling...someone that has downgraded, please dump the bios and compare to the 2.0 psar encrypted dump and let us know any differences.