Frag Monkey,
Greetings. Are you intending to have the player
interact with the group of marching soldiers, or is the group of soldiers
merely for effect?
If the marching soldiers are to be used only as an effect, I
might have a fix.
Try importing three of them, into a program such as FragMotion, fully rigged, position them and export the entire group as a new .x file. You'd have one .x file with multiple fully animated moving parts.
If you were careful and precise, you could even assign unique textures to each soldier.
To save FPS, you should have the new model spawn only when the player triggers it, and you should destroy it, once it is out of player's view.
Best of luck to your in your future endeavors.
Thanks,
Seth Black
"...I'm sorry, could you repeat your question a little louder? I'm a trifle deaf in this ear."
- Willie Wonka