I have done this several times, but it is a bit short notice for you to do it the way I would. 
With a 90 minute journey, the main issue is going to be ventilation for the bees. Hopefully your supplier has thought of this and has a solution. What I would do is take the brood box, plus 3 extra frames to fill the 8 frame hive box. That helps stop the frames from sliding around while moving the hive. You will also need the hive floor, and the inner cover (flat piece with a hole in it that goes under the roof). I would cover that hole with #8 hardware cloth, taped or stapled down. That will be your temporary roof for transport, and the mesh cloth is bee proof but allows some ventilation. If you can’t get the hardware cloth in time, I would use insect screen instead.
You will need a ratcheting strap to hold the hive together in transport. I wouldn’t trust duct tape on a 90 min journey. The ones that you can buy in Home Depot are fine - you will need one about 12 feet long if you ever have a bigger hive to move, and that length is pretty easy to find, so that is what I would get. Loading strain is not an issue for the strap, it will probably be 300 to 400lb, which is more than you will ever need.
Finally you are going to need some way to close the entrance, if you don’t have it already. I normally staple hardware cloth to the hive, but again, you may have trouble finding that. In that case, you will need a strip of insect screen, securely fixed across the hive entrance, either with staples, or if you really can’t bear that, duct tape. I would suggest you do all this before you install the bees - it is much harder once they are investigating what you are doing.
If you are going to put the hive inside your vehicle, I would suggest that the driver should wear a veil and gloves. Even a full suit. Bee stings can be very distracting when you are driving, and you don’t want to have an accident with 8,000 angry bees in the vehicle.
When you put the hive in the vehicle, try to position it so that the frames run the length of the vehicle. That way, when you brake or accelerate, the frames will not tilt and squish bees. Needless to say, you need to take corners gently! 
It sounds daunting, and it is terrifying the first time. However, it really isn’t hard, it just takes preparation. Good luck, and let us know how it all goes! 