When you place ingame sims in the library that is safe as you are only putting clones of those sims - not the actual sims that are hardwired into the game. Generally the only time there has been conflict is ifthey have the same names or if the game itself reclones them back into the game as NPC or townies - then you might get the doppleganger effect which can cause the game to do a lot of pausing when the doppleganger clone is out and about. I have figured out if you go to the trouble of playing their household send them back to the bin and give the a makeover - change their haircolor, their name, maybe even a trait or two so the hard wiring won't get crossed - especially if there are ghosts associated with those sims or backstories - like key sims like the Goths. But once you have them in the bin, delete the ones in your library so they will not get a doppleganger. Once they are renames and enough changes like their traits, it will not be a problem with the ingame versions.
But I still wonder how Dart has been able to delete the EA sims in game and the world not go to pot, as it is a fact hardwired sims fragment. They will only be invisible, but in a hundreds of places in your files if they are part of "the story". Also dart, deleting the criminal building does not get rid of burglars. The burglars are programmed into the game like service sims are - the buildings are not dependent on those sims but are there for the sims you play to have the criminal careers. The RH mean nothing to the Service sims - they even live off world unless they are part of a story. You can delete all the RH's and will not affect the service sims - but your hood will go to pot because then townies and NPCs can't have jobs, so they will leave or die by starvation usually; it generally affects the game play because you can't control all the houses and sims must make a living.
But yes you can move any sims to any hood - user made or EA made - the confusion occurs when two of the same exact sim occupies the same hood. The game does not access the hoods you are not playing - only the one you play - but if they are exact clones, just make sure you remove them from the library if you are planning to play the hood they are from unless you have altered them enough to not confuse the programming. I have played many of the families in other hoods with no problem, I just remove them from the library after I have them in the new hood.
Last thing - the Original 5 basegame families in the library -(I think it's 5 or is it 6), never delete them and yes they can be played in all the hoods, but they are tied into the POOL of genetics from what I was told - so those original ones must always stay there. And as to your grave yard I did not know you were talking about LL Amjoie - so like a dummy I tested the actual game worlds and had no problem moving sims ghost there except the few that needed to stay where they were. But I did not use edit to do it. I moved a sim onto the lot or used a sim living on the lot already to move them. I did not try LL as I do not have that installed at present. I am still updating all my user created worlds and EA worlds to pets and ST. I am waiting to do the store worlds last.
