Hi Kreecha,
To do this you need to edit the python source code, so you wouldn't be able to use the exe directly. You could either edit the source code, and recompile the exe, or just run the GUI from python, by running nemosis/gui.py.
The files you would need to edit are: /nemosis/defaults.py and /nemosis/processing_info_maps.py. If the table are similarly structured to the existing ones in NEMOSIS this should be straightforward.
Basically you would just add in the new tables to these files following the pattern for existing tables.
Let me know if this requires further explanation.
Cheers,
Nick