jjios kismet demo tutorial jazz jackrabbit over[UE4]white mannequin model

Do I have to like change pose of this jazz jackrabbit character 3d model to swap mannequin model in ue4? I mean do I have to use ue3/udk first to change this pose into T-pose?
Epic to revive Jazz Jackrabbit franchise? - Public Commander Keen Forum Yeah this gun hanging pose.