[Eeglablist] how do deal with ECOG and other channels not in .elp file?

[Jim Kroger]

Hi, when the number of channels in our .bdf file does not match the number 
in our .elp file, EEGLAB will not accept the channel locations. We record 8 
extra channels for ecog, etc., as well as GSR data, and want to do analysis 
including these channels. Is the solution to create additional entries in 
the .elp file?

We can digitize the electrodes for ecog etc. on the face (is this 
recommended?), but not the GSR electrodes. Is it OK if we just use "made 
up" coordinates so something will appear in the .elp file?

Or would it be better to add these additional channels somehow after the 
scalp electrodes are already loaded by EEGLAB?

Thanks,
Jim