Here is the user guide/tutorial that Jim will be using at RapiData:  d-star-TREK_overview97.pdf

The Rigaku Americas web page for d*TREK is   http://www.rigaku.com/software/dtrek.html

Jim says that anyone can get a FREE version (Linux or Mac/OSX) of d*TREK ahead of time to use before, during, and for some time after RapiData here