Dear Behrad,
Here are some references that discuss simulated data in Brainstorm.
Tutorials:
https://neuroimage.usc.edu/brainstorm/Tutorials/TimeFrequency#Simulation
https://neuroimage.usc.edu/brainstorm/Tutorials/TutPac?highlight=(simulation)#Simulate_signals
https://neuroimage.usc.edu/brainstorm/Tutorials/SourceEstimation#Model_evaluation
https://neuroimage.usc.edu/brainstorm/Tutorials/Statistics#Simulate_recordings_from_these_scouts
Forum discussions:
https://neuroimage.usc.edu/forums/tags/simulation
http://neuroimage.usc.edu/forums/showthread.php?2563
Articles:
http://www.ncbi.nlm.nih.gov/pubmed/16271483
Please get back to us if you have specific technical questions.
Cheers,
Francois