RC5 searches for the correct key to an encryption method.
OGR searches for some scientific straight line thingy. I forget but one of the OGR guys will tell you what it does.
to disable OGR add this to your dnetc.ini file:
[misc]
project-priority=RC5,DES=0,CSC=0,OGR=0
or to disable RC5 add this:
[misc]
project-priority=OGR,DES=0,CSC=0,RC5=0