MRIcron is easy to use and creates stunning 3d images of sLORETA z-score maps which will give you great insight in the specific deviation sources in the brain of your client.
You can choose to generate nifti files of sLORETA z-scores which can be loaded into MRIcron.
Watch the instruction video below to get started with MRIcron.
MRIcron can be downloaded here:
The nifti file format is widely used and can be loaded into a number of other software packages as well. Many of these software packages can be downloaded for free on nitrc.org.