Disable the "self-delete if dead" code?

Hey, everyone. I am always interested in the game's internals and how the game handles stuff and I was wondering if it'd be feasible to remove every "Is this Sim dead? if so, delete them" check in the game so deceased Sims can then be summoned via InSimenator / whatever else and can be played as.

I tried (and absolutely failed) to replace the Function - Main - Remove Ghost BHAV with the normal Function - Main (which all living Sims use) and this allowed the ghost to stay on the lot once summoned outside of the typical haunting hours, but it made the game lag immensely! No idea why this happened. My only possible guess is the game was spawning tons of controllers or something.

I've heard tons of stuff in the game will actually check if a Sim is dead (whether it be socials or just objects) and it will immediately delete the Sim off the lot if it comes back as them being dead.

My goal here is this: I want to know if someone like me (who doesn't really know how to read BHAVs at all) could pull off such an over-the-top mod like this?

Oh, and this is for personal use. I wouldn't distribute it since I know nothing about BHAV editing and I would hate to ruin someone's neighborhood if they installed my mod and it caused a ruckus.