If Jen sees it then you might get lucky, but as it's an old product I wouldn't bet on it getting fixed any time "soon".

I've checked my notes to see what I did the last time I "fixed" this for someone, which was delete the bones in DS2 with the joint editor from the FST (figure setup tools).

If that's a bit much I have attached a very quick and dirty fix to this post, it's a PZ2 that you apply to the item once you have it loaded into your scene, it has Aiko 3's center/end point and orientation settings for the problem bones (abdomen, rButtock and lButtock), that way the joint parameters in the hip wont distort the mesh as the problem bones are now in the right place.

The other bones will still be getting dragged around but they aren't important.