Downloads for Maplestead are available here;

object files..... here

 sounds..... here

 route files..... here

These should be unzipped into your normal BVE file locations for objects, routes and sounds (*****   not the directories automatically specified when unextracting the zip files   *****).

The most likely destinations for these will be........

C:\Program Files\mackoy\BVE4\Railway\Object\Maplestead for BVE4

C:\Program Files\mackoy\BVE4\Railway\Sound\Maplestead for BVE4

C:\Program Files\mackoy\BVE4\Railway\Route\Maplestead for BVE4