I just checked PSP-hacks for my daily dose of non-PSP related news in the PSP section, when I saw that Dark_AleX has reason to believe this is fake. However, can pj please confirm that the downgrade was successful?
However, DA has good reason, as the first result on Google for dark_thug comes up with his own page, which has viruses on it, they're even labeled as viruses! I can confirm that, as when I tried to download one to scan it, avast! stopped me in my tracks and didn't let me download the file.