[FieldTrip] Neighbours and template definitions

[Marion Vincent]

Dear fieldtrip users, 

I'm trying to implement a 128-electrodes model for the BioSemi EEG headset. 
I need to do so, as it does not exist in the available templates for neighbours.

I was wondering if anyone have already done so, or if you have any tips defining the neighbours.
Are there any standards in the "distance" or criterai I should consider to define my neighbours, to construct the template? 

Thanks, 
Marion