Look, don't get so complicated, you need the platform-tools folder, well, with that you extract the rom, and there in another folder you put the platform-tools folder and then the rom and delete what says "Pablo" Then you run that installer having the cell phone in recovery mode already there connected to the cell phone with the computer or laptop via cable, you run the installer and if it doesn't start you do the same but deleting those same files selected by Pablo but those from the platform tools folder and run the automatic installer, I'm not telling you that it's like that, I don't remember well but one of those two It must be 
