Install the Cabin_Lights_OFF.dds texture file in the Prepar3D v4 main texture folder.

Install the aia_emb_190_l.dds and aia_emb_190_l_dim.dds lightmap texture to each of your repaint texture folders.

Note: you do not need to install the aia_emb_190_l_dim.dds texture if you are not using the 'Dim' Lua script.