Thanks for the script. I've installed it according the help document but I get this error message when trying to load the script:
// Error: "spPaint3d"; //
// Error: Line 1.11: Syntax error //
spPaint3d;
# Error: file: C:/Program Files/Autodesk/Maya2013/scripts/spPaint3d.mel line 17: ImportError: file <maya console> line 1: No module named spPaint3dGui #

Do you maybe know what I did wrong?