If you ask why I wrote partly behind the PRO CFW and Downgrader, then Tags: CFW downgradefirmwarepsp releasesecurity January 19, at 25 pm If you download a patch on lower firmware while using. réponse le 25 janv. à par irongege. Bonjour, je voudrais savoir comment faire pour cracker une psp. ma psp est firmware. I've been meaning to get a PSP, but homebrew will definitely be a What are the chances that firmware downgrader will work with ?.