Can't help you with the process....but here's a warning. Someone else here removed their front seat, disconnected the wiring harness in the process, and made the mistake of starting the car. Which threw an error code, which forced a trip to the dealer. Should be able to find that thread, but his advice was to be sure NOT to start the engine with the seat disconnected.
There's nothing tricky about removing the seats, I've had mine out several times. Disconnect the battery first or else you'll get a fault light for the airbag system. Disconnect the wiring harness for the seat. Remove the 4 bolts for the seat. The seat is not too heavy but its clumsy to move around inside the van. I have a cargo van so I just moved it to the rear- not sure how tough that would be in a passenger van.