Ok, then open your attack storyboard in Paint shop Pro, and the files that are found in the zip at the end of this post. There are 8 smoke BMP files, but you can skip a frame or two in order to get the smoke animation to fit your attack animation smoothly.
Copy the first smoke BMP and past it into your Attack animation storyboard AS A NEW LAYER. Drag it to the top-left corner of the frame where your spherical flash is... That is your initial smoke frame.
Copy the nest smoke BMP in the sequence and PASTE AS NEW SELECTION, which will put it automatically into your new, higher layer. Repeat this step for the remaining smoke BMPs to be used.
Once all are aligned with the top-left corners of the frames they are to go in, use the magic wand to select the pink box around the smoke image and delete it for all the smoke frames. I could have just did that with the BMP files initially, but since they are centered in their box (they wouldn't be in a deleted BG file), these initial steps ensure that the smoke will be properly centered IN ALL FRAMES.
Now select all the smoke images and copy them to the clipboard, then drag them down until the first one is almost completely covering the spherical gunflash prop.
Now Go to the Layer menu and select the Layer Properties option. When the box pops up, choose the 7th option down on the Blend Mode list.. This should render it as a semi-transparent smoky looking overlay.
Now just paste the images that you copied into the remaining frames. For the N facing frames, after pasting the smoke images in all 8 directions, go to the first layer, copy the frames from there, go to the second layer, and paste the base unit frames as a third layer. Then just use the Magic wand tool to delete the pink BG from that, and then you'll have the unit appear to be BEHIND the smoke.
OR (a bit more labor intensive), use the eraser tool set on 1 pixel size and manually delete the smoke where it is covering the back of the figure to get essentially the same, but better-looking results.
Once all the smoke has been pasted and manipulated to satisfaction, just load your pallette and save it as a PCX and you're DONE!
Here's the files you need for the smoke.... I'm not the best unit maker on these forums by a LONG shot, but I can at least be the most helpful one.