Buildings With Doodad Model

Hey,
I'm using TFTWE and I'm trying to make a building have a doodad model. The only problem is, the doodad is from a Lordaeron tileset, and my map is Cityscape. How do I do it? I tried setting it to "Skull Pile", but when I place the building it's a green/black checkered box and says it can't find the model. And changing the tileset is not an option...

Seach for the correct path in the war3.mpq

Thanks! I had to change it to "Doodads\LordaeronSummer\Props\SkullPile\SkullPile0.mdl" with custom...