Not sure if this tool will do it, but it says it will do hi-density sub-D shell connectors, and they are close to what the molex pins are in size.
**broken link removed**
At least its cheaper at $42 US. If you are going to do several hundred terminals, forget the Radio Shack one. The thing about the "proper" tool is that they usually are cycle controlled crimpers, where the tool ratchets closed and must be closed to a settable point before it opens. This guarantees a repeatable, finished crimp everytime. It is also far easier on the hands, since you are only squeezing to the next step in the ratchet.
I have several AMP crimpers at the shop, and when I need to install three or four hundred terminals in one day, I always use a cycling crimper, and dont mind that I paid $200 for it, my hand thanks me too. The Radio Shack one I have is for terminals I rarely use, so it gets me by.
As an aside, AMP at one point would not even sell one of their automated terminal installing machines. You had to lease it, and not for cheap either, but rated on the volume of terminals you were going to buy.