Now, how to create an animation? Well, you need a program, at best for free.
Basically, I recommend to use Gimp 8.0, a refined free graphics program. I can also recommend to get acquainted with this program on a basic level at least. You need to know what layers are, and how to shift layers. You should also be able to have an overview at any time of the process.
Then, if you have looked around a little, open the large animation chart. This is your first layer, and is for your orientation only.
Afterwards, open many icons of your unit you want to create an animation for. Spread these icons loosely around this animation chart, so that they are located somewhere. It's not important where they are yet.
Now you need to have a basic animation. Take a normal animation from the animations file of the standard game. This has to be the animation with the largest flame, burst or whatever. Take the largest one first. This is your base animation. Load it up, and give it a name.
Take one of your unit icons and put it in a location where the burst is springing forth from a gun.
Take a second animation for the next gun. Shift it around, so that the opening of the second gun is dealt with. Take care that the relation of the burst is allright. It's not where the bursts actually are, it's where the bursts are spinging forth, and the relation of the bursts.
These two burst do unify in a new layer. (For that you need to swich off the visibility of your animation chart, switch off all icons. Only the two animation layers need to be visible).
You are ready. The animation is finished, at least, if there are no more weapon openings left. You need to add a third or more layers, if an opening is left. Then, export the layer and give it a name you can recognize.
Now its the time for finding the proper numbers. If the animation is small, you may shift an icon precisely between the red borders - each pixel is important - so that it is located exactly in the middle of a red square. Focus on the part of the icon which is facing to the right. Then, shift the icon with the arrow keys up and down, and count how many times you have to press the button. This slow method gives you quite precise results.
If you need to shift it to the right, count positive, when upwards, count negative. This is the efx number for the side facing right.
This works, in most cases at least.
