The Ha layer is set to Luminance blend mode, the RGB image layer is set to colour blend mode.
I was thinking of setting the Ha to screen blend mode, but that seems a little too aggressive... I could give the Ha a bit of a push in curves..
The selective colour tool would probably work wonders, however I wouldnt know what colour to set it as.. Tricky eyes.. I'll get to work on it tomorrow some time, see what I can come up with... This is exactly why im leaning towards a mono camera and SII Ha OIII filters..
hahah