Hello guys. I had a problem; I wanted to play the game in my native resolution, using DirectDraw=0, but terran.exe always crashed as soon as I loaded my game. So, after a couple of hours, I finally found the solution, in a most ridiculous way:

DirectDraw=0 only works correctly if your resolution sizes (1024x768 etc.) are divisible by eight (8).

It didn't work for me, because my desktop resolution is 1366x768, and 1366 isn't divisible by eight, BUT 1360 is. So after changing my desktop resolution to 1360x768 the game runs fine with DirectDraw=0. I practically don't even notice the change in the resolution, there are just tiny tiny black bars on the sides of the screen, each three pixels wide, totally unnoticeable, but it makes the game work!

I found the solution in this post by korell, who just mentions the "divisible by eight" thing, and I was so desperate that I decided to try it, and miraculously, it worked.

Thanks to korell for mentioning that, I hope if anybody has this problem this will solve it for them!

korell's post: https://www.gog.com/forum/sid_meier_s_alpha_centauri_/black_bars_down_sides_of_screen/post3