That's FlySimWare's Cessna 120 pack. I'm playing around with repaints, some of them fictitious (see above) and some real world. It's a pretty old model and the fuselage is mapped to a single mirrored texture, so that precludes any paint schemes with lettering on the fuselage. That said....there are actually a lot of 120's out there that have their reg no's on the tail.
I'll make some for AH's new 140, ( about 12 years newer?) and then upload the mess of them all together.
Regarding the dust texture, I think it's Bill Lyon's "dustrun" effect. He packaged it with all his releases. I relabeled it to overwrite the default....hmmm.....I think ten or twelve years ago....?
And still not ready for P3D........
Here's one of the real ones. C-FSME lives in Quebec south of Montreal.