1. Some will say reset the ECU, I never did, and got accurate results.
2. Yes, put in sport mode.
3. Manual mode and shift before redline.
4. Run the Dyno in 6th - the one to one gear.
5. Turn off the Climate Control.
6. When you arrive at the Dyno shop, let the car sit (in the shade) for awhile and cool off. (Most Dyno shops run with the hood open and a large fan blowing on the engine}.