windowed mode works as intended, but too slow on my system. also, I want not just doublesize original resolution, but stretch it from 16:10 to 4:3, so I must use 1280x960 instead of 1280x800.
this problem was solved in dosbox - you can set your fullscreen resolution and fixed aspect, so all games will stay in it's true aspect and games with 320x200/640x400 will automatically stretch to 320x240/640x480. it'll be cool to implement that feature in cnc-ddraw
and one more question - can I stop creating of title.pcx?
sorry for not so good english)