About the preset you used, your solution works but if you want modify the preset to reduce the smoothing 1 tip.
Of the many sliders 3 are most relevant because how they interact together:
the filter first try to determine which are the edges to preserve (on the base of difference of contrast with neighbors pixels) and the image structure ...then apply a blur but along the image structure.
1 Sharpness= change the threshold that determine which are edges , more you raise more part of the image will be seen as edges to preserve
2 smoothing=how MUCH of blur to be applied
3 anisotropy = determine HOW the blur will be applied:
more you raise the value more the blur will try to follow the image structure and so look ..sort of less blurred
So you may balance more blur with more anisotropy (one of my favorite trick, give a painted and often glossy look but preserving neat edges...you may transform someone in his wax sculpture )
Or if you simply want less smoothing you may
1 reduce "smoothing"
2 if the global level of smoothing is fine BUT too much edges are smoothed you may increase "sharpness"
3) or you may change effect of the smoothing making it follow more the image structure raising "Anisotropy
basically are 3 variables to play (much more but those 3 are the most relevant )
before using as main component for my favorite filters, i did play much with it, (as example here http://www.flickr.com/photos/photocomix ... 871852975/
) it is really powerful for both denoise and special effects