You're going to have trouble getting the Genetic Horror to work properly if you intend on putting it into Generals.
It looks like you modified one of the basic infantry so that it looks like the concept art.. the problem with that is that now your character isn't in the "bind pose" that all the skeletons in Generals use.
However, even if you were to put it back into a pose that resembled the bind pose things would probably still be pretty weird looking with a 4 armed freak being animated by animations with only 2 arms...
In other words, to get your Genetic horor to work properly you'll need to set up new bones for it and make a new set of custom animations for it's basic movements and other motions.
That said, showing off Generals infantry is kinda silly when they have no skin :P they're os low poly there's not much to them before they're painted

Show another picture once you get it finished =)