The latest update of ShaderMap brings improved normal to displacment conversion with additional controls for contrast and height. There are other new features as well including linear magnification on preview image controls, additional zoom controls, and a map control button to refresh source images from file.
Next up... ShaderMap 2 R1
I'll be rebuilding the normal editor which means implementing a layer system, adding a stencil brush for painting displacement/normals, adding shapes using a vector library, an eraser tool for rasterized layers, and line/box/oval/curve gizmos. Wish me luck.