Believe it or not, as of 11/28/15 this mod is not dead. I just don't know what else to add (yet)
Details
First of it's kind in single player, a large state prison map with an interior that includes a gym, cafeteria, snack bar, game room, cell block, guard areas and many other objects. It includes a large exterior yard with many details to give it that confining feel.
It now includes a LS County Jail (Was going to be seperate, but I accidentally merged the IPL files so why not just throw it in there too.
Changelog:
Added LS County jail
Separated the map from the CARTER warehouse, it was once inside the warehouse itself, which would make the single player impossible to complete, and cause instability.
Removed the ENEX marker leading into the prison: There is still an ENEX for the county jail, which works fine. I replaced the one for the prison with a CLEO script, which is much more stable. I tested it 20+ times and got no crash at all.
Added detail (Lights, vents and other misc objects)
Replaced the benches in the prison with better looking ones
Removed lobby and other things that were nice, but caused instability.
Stabilized the entire map by giving it a new interior number par with that of the CARTER warehouse.
Added security cams in the yard and interior.
Modified the gym a little bit.
Replaced the 2nd caf with a game room.