Replacing radiator in 2001 express today......any tips.

Van sprouted a big leak in the radiator at the end of the day yesterday. It shoots a stream 30 feet out the front of the van through the grill. We need the van in the AM for a big commercial job that will require all 3 vans and crews so I am going to have to do this myself. I already purchased the new radiator ($145).

I have never replaced a radiator on a vehicle so any tips are welcome. I have watched 2 "how to" videos online and it seems fairly straight forward.

Thanks guys.