Please note that you may like to check out the:

CRYS2RUN Powder Indexing System for DOS/Windows by Robin Shirley et al powder indexing suite
(incorporating TREOR, ITO and DICVOL) on the CCP14 site.
   http://www.ccp14.ac.uk/tutorial/crys/index.html

This includes a Basic Demonstration of CRYS2RUN Powder Indexing System 
   http://www.ccp14.ac.uk/tutorial/crys/basic.html

Lachlan Cranswick - CCP14 - 9th September 1998
l.cranswick@dl.ac.uk
http://www.ccp14.ac.uk
ccp14@dl.ac.uk

Also, as of this time, another integrated Powder Indexing system is PROSZKI for PC
by Wieslaw Lasocha available at ftp://trurl.ch.uj.edu.pl/PRG/PUB/