Sorry for not speaking Polish but I am desperate. My P550 after a 'low'format does not run at all-black screen only. With help from Greek forums someone incredibly found you guys. With his help I have on an SD one .exe and one .bin file. When I try to run the .bin file I get the same screen messages like you 'Invalide' etc. Can someone please write the steps from beginning to end for installing from SD? Unforunately because I bought my ppc from ebay the dealer in greece gives no support so you people are our only hope. Thank you. Dziekuje.