The Kilrathi seem like a rather daunting project (given the need to make very large graphical alterations), and taking into account that fan projects seem difficult enough as it is, few people have been willing to give it a try. Though, IIRC, there is a WC1 mission package available on the CIC's missions page which is supposed to be from the point of view of the Kilrathi. Or something... I never got it running, as I recall.