Well, since everything I've seen points says that the racks aren't changed between 2001 and 2002, Yakima says (for a 2001) you're going to need a LowRider kit to attach your LockJaws to it... due to the incompatible shape of the MPV rack's cross-members. The LowRider costs $115, and then you're going to need 48" cross-bars that cost $42. I'd check ebay for these items to get them on the cheap, such as THIS auction that ends on June 9th.
Now, if you already have bars, then you're that far ahead of the game. If you have Q-Towers, then I don't see why you can't just buy the Q-Clips for the 2000/2001 MPV and use those. Don't quote me on that, I just don't see how the clips wouldn't work on the new van... how much of the door opening could they have changed?
Hope this helps,