Thank you for suggesting a workshop on processing spectra using ISIS. Everybody will have different issues and I agree that your ideas of how to proceed are in line with my own thoughts. I do not think that setting up a session on tuning the instrument is necessarily the most difficult part but maybe it would be welcome to those just starting out. Isis is a very quirky piece of software and do have on my PC samples produced by Francois Cochard.
Working from first principles consider the following: –
1 Setting up the working directory
2 Data reduction using the master tab
3 Wavelength calibration
4 Instrument response curves
5 use of GNPLOT