The updated radiator on my 02-
If you get the new one from a dealer and they know you have an 02 (they'll ask for VIN), the additonal parts should be included. Aside from the new hoses to accomodate the cap, the radiator itself drops right in to replace the old one.
With the second cap, filling the system is much easier. I've done mine a couple of times, filling it slowly with both caps open, and there was no trapped air.