These were my results with the included GTA San Andreas 'enbseries.ini' file from the download. Straight V key, just resized to 1000px.
Stock 1

ENB 1

Stock 2

ENB 2

Stock 3

ENB 3

Stock 4

ENB 4

Pretty impressed with how all the textures look a little darkened, but haven't experimented at any other times of the day/year other than this one flight set to early morning in autumn.
My questions is- does anyone here know of, and could recommended a modified 'enbseries.ini' made just for FSX? Or in particular for Orbx/NZ textures? Cheers.