Yeah, I used to use Immersive Display Pro on my P3D projector setup, I’m familiar with their support policy 
If you have a setup like yours, I think it’s straightforward. It would be less so with anything non-standard (non-cylindrical screen shape, 2 projectors vs 3 etc) because the underlying multi-view support in MSFS is so limited.
Good to see people are getting it working, though. Do you have any pictures / video of your setup? Might be worth posting in the Home Cockpits thread.