n00blet88 your a idiot.
1) You don't know if they work because you've never used them and they don't work theres a 99% chance they don't, feel free to explain how you obtained them.. wait let me guess 'old' cafe logins.
2) You can't just make a cert and expect it too work anymore.
3) Steam has patched almost all/most cafe exploits even the extremely private cafe cracks on sites other than freesteam dont work, I myself was using a private cafe crack and it got patched around june.
In other words don't bother, locked.