If it's on 4.82 Demo FW the 4.82 Reverter should work... some others who couldn't get it working found out their console wasn't on the Firmware version they thought so they ended up using a different Reverter. Something to double-check anyway
Do you try to install it via XMB or via factory menu (after shutdown hold the powerbutton til the PS3 shutdown again, than hold the button til the PS3 beeps three times (one beep and after 2 seconds a double beep)
I installed the game via xmb after i restore the backup i went to recovery mode to update using 4.82 reverter by prince but i got an error that the file is corrupted
Sup y'all.. I got quite bored and impatient of waiting, so i made 4.83 CEX2SEX converter & reverter for myself and any of yous out there who also want.