Make them static (defaultstatic = 1) in the fpe, or create a simple script that loops the idle animation and does nothing else. This script works with the combat soldier (and any others that use the same animation frames, or just add your own frames).
function soldier_idle_init(e)
end
function soldier_idle_main(e)
if g_Entity[e]['animating'] == 0 then
SetAnimationFrames(900,999)
LoopAnimation(e)
g_Entity[e]['animating'] = 1
end
end
