First of all, great work! This is the nicest usage of the MeVisLab Path Tracer that I know of.
I downloaded the zip and tried the example networks, but they all had no filenames in the loader modules.
I managed to load them manually, but wouldn't it be much nicer if they would already contained the paths to the example data?
You could also add a RunPythonScript to each network which loads all datasets and presses the appropriate buttons automatically.