hmmm...
there are many just simple ways that don't need to edit each all frames by manual
here are some ways what i know exactly...
1. composit and use PS Actions or GIMP Script
- first cut n copy/paste zealot's sword from origianal frame
u just need 17 angles image so just copy 17 frames
but might need frames much more if want animated sword
- match picture position between marine and sword
and just insert one to other layer and save
- ok... record Action that workflow if u use PS
or write GIMP Scripts if u use GIMP
and make one those for repeat to all images but u need to attention to file names ,format and systematic
2. use 3d software
- this way is very simple first make each all images to animated file
such as avi or gif or any others
- array that animated zealot sword and marine into 3d software
and match angle
-modelling sword and texturing and just rotate as fit to turned angles
-rendering to BMP image or FLC animated file
- save all to 8bit BMP and match pallete by Actions or Script with use PS,GIMP
Actually i use that workflows for my Threekingdoms mod
i had creating all unit grp by these mentioned Actions and Script with use PS,GIMP
PS Actions easy to understanding
GIMP is difficult a little but it's make anythings without limit as u want
aight~! that's it
dude, but i'll not challenge to ur offer cuzz that's worthless
so that's fool around though it there is simple way
referring my explanation and rest is just ur task
and try work by ur self that would be more good for u
Anyway... Good luck~!