I've done this w/ KC Hilites, but I assume how you mount the stuff up is pretty standard.
You need rings for the lights, they clamp onto the circumference and have mounting tabs on them.
You'll also need the hardware kits that have threaded doo-dads that pop rivet to the fiberglass pod and will also have long allen head screws and springs and washers which you use to mount and aim the lights.
Here's how I did it in 11 easy steps:
1. Mount a ring to a light snugging it down to where it's secure, measure the gap where you're cinching down the ring and write it down.
2. Remove the ring from the light and then cinch it back down with the same gap you had when it was on the light. This way the tabs will be in the exact orientation when you put the light back in. Do this for all the mounting rings.
3. Layout the rings on the pod to see how you want them oriented. Tabs up-down & left-right make for easiest aiming, next best is an "X" if you have interference with the tabs all layed out in a "+" fashion.
4. Now that you know how you're going to orient them, center up your first ring and tape it down or hold it or whatever, and drill your first hole using the hole in the tab as a guide. Now drop one of the allen screws through the tab and hole and drill the opposite side, drop an allen bolt through that one, drill the other two holes. Now shit is aligned with the tabs on the ring.
5. My threaded doo-dads mounted with two small pop rivets. What I did was thread the allen screw into the doo-dad from the back side to get the doo-dad aligned in the hole, then drilled for one of the pop rivets, dropped a pop rivet through the doo-dad into the hole just drilled and drilled the other hole.
6. Lather, rinse, repeat for the 3 other mounting tabs.
7. Pick a drill bit a couple sizes up from what you used to drill the big holes and oversize the big holes a bit. This is important because otherwise it's a PITA to get the allen screws into the threaded doo-dads.
8. Pop rivet all the doo-dads, mine went on the back of the pod.
9. Lather, rinse, repeat for the 3 remaining lights.
10. Put the lights in the rings using the gap you wrote down.
11. Screw 'em all toghether.
Here's my pod when I started:
And completed:
You can see the tabs on the light rings and what I'm talking about when I say measure the gap when the ring is cinched down. Can't see the threaded doo-dads alas.