Driving lights

Spreader on passenger side and spotter on drivers side is the way most people do it, so that you get as much spread off into the bush as possible and the spot beam can go as close down the line of your vision as possible.

I dont think it really matters. As setup is often a personal preference, I personally have two spot beams cause the cdread beam comes from the headlights with Plus50 globes in them, I find it works better.

In the high country I have "crossed" the lights so the righ hand light is pointed about 40 degrees to the left and vice versa, that way the lights show around the bends in the hilly country roads.

Personal preference. Don't forget to wire them through your high beam so that they switch off as you select low beam. Illegal otherwise for road use.