I like working with SketchUp and Vray. But I have problem with texture maps. Rather, I have a problem with distinguishing where to input each map. Also, I can't find a guide on the short names for the maps.
Can someone please explain to me or post a guide about all the shortcuts and where to input each map in Vray.
Some examples:

Gray001_COL_4K - I guess COL stand for Color and should be inputted into the Diffuse channel.
Gray001_DISP_4k - I guess DISP stands for Displacement and should be inputted into the Displacement channel.
Gray001_REFL_4K - I guess REFL stands for Reflection and should be inputted into the Reflection channel.
Gray001_NRM_4K - I guess NRM stands for Normal and should be inputted into the Bump channel. But, which bump type should I use (NRM Map-tangent space, NRM Map-object space, NRM map-camera space, NRM map-world space, Bump map-local space, Explicit normals or just use bump) and how to make the distinction between each?
Gray001_GLOSS_4K - I guess Gloss stands for Glossiness and should be inputted into the Glossiness channel. But, should I put it under Reflection Glossiness or Refraction Glossiness? How do I make the distinction?
Gray001_Flat - What does this mean and where should be inputted?
Gray001_ao_4k - What does this mean and where should be inputted?
Gray001_arm_4k - What does this mean and where should be inputted?
What is the distinction between nor_dx and nor_gl map?
Gray001_height - Is this a bump map? I am not sure.

If someone can explain this to me, it would be greatly appreciated.
If someone knows a course or tutorial that explains this it would be also greatly appreciated.