I just recently purchased a DVD tutorial from Eat 3D and it was very informative. I have also been reading the scripting documentation on the Zbrush website. I have been having trouble trying to figure this out and I am sure it is very simple.
One thing I really like Maya that I wish Zbrush had and I am very surprised that it does not already is a capability to snap one subtool to the surface of another. Snap to vert or make live.
One way I was thinking of doing this is using the getting the position of the transpose tool in the position that I would like the other subtool to be in and using the [TransposeGet, Start xPos, Start yPos, Start zPos, End xPos, End yPos, End zPos] to grab this information then selecting the desired subtool I would like to position and use the [TransformSet,xPos,yPos,zPos,xScale,yScale,zScale,xRotate,yRotate,zRotate] to snap it into the same position that the transpose line was in but take out both of the scale options because I would like to change that manually.
I am currently running IButton as the top level commands to run this script but I would like to eventually set it as hot keys or even better some how set it to the transpose line itself.
One issue I am running into is that the TransposeGet and the TransformSet commands use different positioning commands. The transpose has a start and end where the transform uses scale and rotate.
Blender has something similar to what I am thinking of at the beginning of this video that I think could apply to what I am trying to do: