As experienced community members note: "SLRR By Jack is made to measure, if you change anything in it, it will probably crash... except some mods that are specifically made for it" . Installing additional mods not designed for this compilation may break the game.
Beyond raw content, Jack V4 addresses the game's stability and presentation: Slrr By Jack V4
Once a version of a "Jack" mod is located, the installation process is relatively straightforward: As experienced community members note: "SLRR By Jack
The SLRR engine can still be unpredictable. Periodically copy your saves directory to another folder to protect your career progress. Conclusion: The Ultimate Virtual Garage if you change anything in it