Okey
The name space was/is pretty limited, if you only have a eight digits (numbers & alphabets) for the terrain, 3D object & texture naming.
If I remember it correctly, there was some strange things at least with the textures, if textures had a same names in different .res files. Something to do with past cache system.
I have not tested the latest TE-OE, so I don't how it is now. I'm just curious.