Troy, you'll have to stretch the s2 way more than the others so you'll need more subs or it will tear apart. With what you have, stretch to balance the hystograms, ie: you might have to wind the Ha back while stetching the S2 a lot, it depends on the target, but if you get the hystograms looking the same it will mix better.
To get the hubble palette happening with the yellows and golds etc start with th
is page. Then check out
tone mapping for another approach.
I'll be back in ozzie next week if you need more help. I've been more than a little Internet challenged while travelling around NZ
