I assume using backup manager to load games doesnt bypass the firmware checks? I believe there were ways to bypass firmware checks before the ps3 was jailbroken. Is there a different method to use now that the ps3 is jailbroken?
The bypass/proxy methods were recently blocked, see here for more details: http://www.ps3news.com/playstation-3...-issues-arise/
At the moment there is no new way to do it unfortunately.