Dear CCL'ers, I have to give a presentation on 'Practical Molecular Modelling' on a college level. I would like to present an example which can be performed as a lab exam on a PC. To show that molecular modelling can produce new insights, the result of this exercise should not be completely trivial. Is this too much to ask for ? Any suggestions or pointers are welcome. Thanks in advance, Ulrich Essmann e-mail: Ulrich.Essmann (+ at +) gmx.de