Color Texture On World Comp Terrain

I was wondering if anybody knows a way to load tiles for a large base color texture to be used in conjunction with weightmaps?

Currently I’m needing to create a large terrain (500 Km x 500 Km) and the best method I’ve come across is using World Comp. The terrain also needs to use Satellite images for the texture of the terrain tiles. So what I’m really looking for is a way to import the base color texture for each tile in a similar fashion to how the weightmaps work with World Comp terrains. I am going to be working with thousands of terrain tiles, so need a fairly straight forward process. Is this currently possible?

Ideally the method would also be able to work with the weightmaps as well, to keep the nice detail added with the tiling detail textures.

Thanks.