tj - Insimenator and many other mods work in SLS, but you will need to enable custom content.
Sims2Pack Clean Installer may not work without The Sims 2. I don't know. But if you do use Sims2Pack Clean Installer the "downloads" folder it will use will be the one created for The Sims 2 - not SLS.
You would need to use the custom (non-default) installation method -- see the
Sims2Pack Clean Installer website for more information.