(adsbygoogle = window.adsbygoogle || []).push({}); If we HAVE to resign .PKG's everytime the firmware updates, are we not using the right keys?

I mean, there is obviously some sort of key that lets me run for example Red Dead Redemption, even though i only had to install the game data once or update to a certain firmware once.
Isn't there a way someone could just find what keeps these games from needing updates after every FW update, and add it into the signing or coding in the .PKG's one would install?
In other words, there has to be a key that makes the .pkg look legitimate no matter what FW the ps3 is on.
I would compare downloaded game files against themselves, to find irregular similarities, and add that similarity to the current .pkg for say blackb0x or multiMAN, but I lack the tech/file knowledge to do so.

Please tell me if this code exists/if it is possible.