Flashing ATI Radeon 5870 HD getting dd: 9223372036854775807 error

hey guys, have 5870, works fine want able use efi boot native cards.
did extraction of cards rom , put in home folder named xfx5870.rom thing links efi rom dead, searched on , can't find files.
files needed 5870_vervet_netkas.efi , fixrom.py.
can assist getting files please?

in advanced!

 

most starts in netkas thread: make own radeon hd 5770/5870/6870/6850 mac rom!

 

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