This was a tough one. Two of the greyscales were good quality and matched each other well. The third one in red was in need of quite a bit of adjustment. My end result is too red. The stars in the center should be more blue tinted. Here is the APoD image from December 11, 2012 for comparison.
This image shows the dark dust lanes that are common is many astro-images. They are in silhouette with the glowing gas cloud behind. It is likely the result of a collision between galaxies. The collision disrupted the usual appearance and scattered debris around. For comparison, here is the APoD image from April 4, 2005. I was pleased with my result on this one.