yes, i'm still keen on understanding this process completely, and i'm reading the RedHat-CD-HOWTO, which seems a bit confusing. if you're interested, i'm looking at www.tldp.org/HOWTO/RedHat-CD-HOWTO/include-updates.html section 5.3.3.3, "Update the comps.xml file" if you read the instructions, it syggests downloading the comps-8.0.tar.gz tarball, installing comps-extras and doing the next several instructions. however, if i try this without making any changes (which should work), i get a number of CRITICAL ERRORs. without getting into that just yet, i'm baffled by the call to the "getfullcomps.py" utility, which is called with an argument of "comps.xml". is that a typo? *what* comps.xml file? there is no comps.xml file in this directory yet, since the whole purpose of this process is to *build* one. based on this section, it seems clear that the eventual comps.xml file is generated only toward the end and finally copied into your build tree. so is that argument name an error? and is there somewhere an official doc on this process? thanks. rday Robert P. J. Day, RHCE, RHCI Eno River Technologies, Inc. Unix, Linux and Open Source training Chapel Hill, NC Waterloo, ON. http://www.linux-migration.org