Loading 3rd party IR Quad & True Stereo files into REVerence

Can someone explain how to import multiple IR files into REVerence.
I have some 3rd party IR files that have 3 .wav’s (L, R, C) for instance.
Does this require 3 separate mono channels each loaded with a REVerence instance and one of those mono IR files?
Then your vocal input to all three channels each panned center left and right?
And what about Quad files?
I read where you could “interleave” multiple files by using the “export audio mixdown” but not sure if that is the correct way or how to best mix them? I would imagine it’s one L, one R and one centered…but no idea if that is correct?
Any help or info on this would be greatly appreciated…