Didn't do modification been a while, this time, I bring an MV-22 Osprey, and still from FSX...
(someone pm me that request aircraft mods, also I want to make them, but there is no model from which game I can do it now, so please understand. )

replace dff and txd in gta3.img or copy into modloader, then put osprey.asi to gamefolder and cs to CLEO folder, done.

recommend install SilentPatch(already in the zipped file) to solve some model brightness problem.