No, not all scripts. And they aren't the 'base', it's the modified version TSLRCM uses. So modmakers can use it if they have to use the Ebon Hawk onenter and make it TSLRCM compatible.
It's just a few files really I think, onenter and a_next_scene in the 003EBO.mod, and the new base loot script is dropped in the override folder. That's about it.