Yep that's the image I was thinking of. Since it's (to my knowledge) the only image we ever saw of the Krygs it's all I really had to go on. I thought the head design was pretty close with the eyes, jaw and teeth between the art and models. The models are certainly a little smoother and less gribbly, which I actually prefer.
Who knows, the Fallen Frontiers game itself might be damned good and I can just play that game with these models and be perfectly content with it. On the other hand, I thought there might be a few folks out there like me who still love AT-43 and wouldn't mind expanding their game through a little creative customization.