Well, if you own the game you should probably visit PSN and re-download it (to obtain your .rif-file).
If you don't own the game, you might try and look for a .rap-file (and use either PSNPatch or reActPSN) and "activate" the game.
If you can't find a .rap-file, you might find a "patched" .edat-file (or EBOOT), and then you need to replace that/those file(s) in the installed directory.
With reActPSN I believe they must be placed on the USB-drive (closest to the BD-drive).
With PSNpatch (which can also activate .rap files), you can either place them on a USB-drive or the HDD (and probably also an external HDD). PSNpatch has a config-file in it's program-dir that you can edit to match your needs (change the path to .rap-file location).
There is NO need for Internet from the PS3 what so ever in these procedures.
Human vision is logarithmic, it's not linear. And nits doesn't tell the whole story of perceived brightness. OLED'S look brighter then LCD's even when both are set to the same nit values because of the higher contrast ratio on OLED's
"And nits doesn't tell the whole story of perceived brightness" it's not about perceived brightness it's about all HDR content in TV and movies being mastered for 1000 nits so it doesn't look right with anything lower, it's also about dynamic range
OLED's can get away with a lower peak brightness and still provide punchy HDR because of their contrast ratio. Like I said human vision is logarithmic. The higher the peak brightness the diminishing returns in perceived brightness.
@The Real Jdbye Oleds hit around 750 nits nowadays. The difference between a 1000 nit and a 750 nit isn't huge. It's only about a 4% increase in perceived brightness. Not huge at all. You'll need at least 2000 nit displays to notice a bigger difference.