there are many access panels on the dash that remove just by pulling on them. one place to mount switches is just above the speaker on the drivers side, another option is on the A-pillar, remove the plastic cover drill your switch hole , done , there are also many companys that make switch panels, day-star and rugged ridge are 2 that come to mind.
now for getting the wires into the cab of the jeep. open the hood and look between the fender and the tub of the jeep, you will see a quarter size foam plug on both the left and right side of the jeep, use a coat hanger to pull your wires through those foam plugs. ( use a wire coat hanger, i tried a wooden one and it did not work to good ) after you pull the wires through you can squirt some foam in a can to reseal any gap left by pulling the wires through. good luck with your project.
as for how you want your lights to be aimed, thats solely up to you. i have my pencil long range beams fall just beyond where my low beams hit the ground. about 15 feet farther out.. now as for my flood lights, i use these to light up the sides of the trails. i have these aimed so the fall in the same place as the low beams. it gives my more light right up front and more than enough to the left and right side of the jeep.... with the headlights on and the pencil and flood lights on, i have more light than i could even need out in the woods.
life is too short to be taken seriously all the time,,,, go buy a MR.potato head and have some fun.