Talk Aims
Show there is a variety of freely available software out there that can help you with your work via diffraction and crystallographic methods
Making use of the latest software can make your difficult problems easier or doable.
Where time permits, give screen dumps of actual examples
Emphasize that it is unwise to use most of these programs as a black box
Mention (again and again) variable count time data collection and Fundamental parameters peak profiling as things to take an interest in.