I had typed up this big thing about the logistics, but instead, I will just say exactly what would work best. Put the two HPS on the ceiling. Then, out the 3 42 watt cfl's, one on each wall facing the plants. Then, get somethign like a mic stand (this is important, id invest in something at least similar) and put the final 3 lights in it, each facing a different direction, trying to encircle the mic stand. This one may get a little trick, so some ingenuity would be helpful. Don't put any on the ground facing up, light on the underside of leaves is bad for them. The low power of the lights would probably not actually hurt them, but its just a good practice to not do, and it won't really help yields.
In short, yes, if you place the lights right, you should be fine. You won't get straight up dank out of it though, but with some stratigic placement, its worth it.