in DCSworld/config open graphics.cfg
and when you see this kind of lines:
"./Bazar/World/textures/TexturesBMP_weapons",
"./Bazar/World/textures/WorldTexturesBMP3",
"./Bazar/World/textures/WorldTexturesTGA3",
"./Bazar/World/textures/WorldTexturesTGA2",
"./Bazar/World/textures/WorldTexturesTGA",
"./Bazar/World/textures/WorldTexturesBMP2",
.....etc
add the line: "./Bazar/World/textures/SU-30M2",
it will show the model that he has to use texutre files located in this file