Had a go at blending colour data and HAlpha of NGC 3766 and Running Chicken.
Colour data 7x(1M, 2M, 4M, 8M) at an ISO of 400. Used EasyHDR to produce image.
HAlpha data 3x16M at an ISO of 500.
Large image 1.5MB
http://members.optusnet.com.au/~avandonk2/tstb.jpg
Details.
Camera Canon 5DH, 300mm F2.8L at f/2.8. Colour taken with HUtech LPR filter. HAlpha taken with Asronomik HAlpha filter.
I used Registar to obtain identically sized images of the same region from each image.
I then used Images Plus to split both images into RGB fits and then auto combined the B and G from the colour image and the R from the HAlpha.
I will let you decide if it is an improvement or overdone. Here is the original colour image 1.4MB
http://members.optusnet.com.au/~cheekyfish/300f_L.jpg