Thanks man, it works JK LOL, i watch the video but there is nothing wrong, i don't do anything wrong when i merge it,i try to load to the plane but it's still all black, i nearly give up, but i delete the textures of the 737 cockpit in the texture.ACA folder and i put the jf 757 cockpit texture from texture folder (originally the texture folder is named texture.cockpit but i rename it because that's what the video said and also it's from the jf 757) and i try to load the plane and...... IT WORKS! And again thanks but it didn't help it AT ALL but, it helps me to think more ways.
Nawwaf