You find it in Eden Editor in Props, then you spawn it in somewhere.

引用自 Combine Soldier：

You find it in Eden Editor in Props, then you spawn it in somewhere.

how you get the full ship

That is the full ship

Unless you mean that there are people who sometimes make full interiors to it, then you'd have to either ask them for it or make an interior yourself

Open up the readme of the Mod, it is explained there

引用自 Lumnuon：

Open up the readme of the Mod, it is explained there

where is it...

引用自 Lumnuon：

Open up the readme of the Mod, it is explained there

Is there like a composition for the interiours?