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This document contains all the config options for Pro E/ Creo Elements 5. Brought to us by:
http://www.proesite.com/UTIL/view_config.html
There are other documents for other versions of the software there as well.
Enjoy!
It's a good link. It will provide a searchable database of config options, from R19 thru Creo 2.0, and in many cases provides definitions of greater detail than you get from ProE/Creo.