OK, but you can also get them from expanding the hotfixes with the /X option. I guess the only question though is what benefit do you get from the catalog files? I thought it had something to do with the file protection, but maybe I have more reading to do. Even this link from Microsoft (although it was written for 2000) shows instructions for creating the svcpack.ini file and says to expand the files and include the catalogs, but doesn't say much about what they do. http://www.microsoft.com/windows2000/downl...P4/HFDeploy.htm OK, I just found more information at http://support.microsoft.com/kb/q282784/ This is really about the qfecheck program, but it does say something about how one problem that qfecheck looks for is files that are out of date or the wrong version when compared to the catalog files. It says "For each file that is installed by a hotfix, Qfecheck checks to see that the current catalogs on the computer contain the information that would be used by Windows File Protection (WFP) to validate the file. If a file is valid according to the hotfix information in the registry, but the installed catalogs do not concur, Qfecheck reports an error." So now I guess the question becomes this... is it just convenient to leave out the catalogs, or is it more proper to include them? What are the pros/cons of doing it either way? Thanks for the feedback... Oh and anyone can chime in on this... I'm not trying to make it sound like I'm picking on Incroyable. In fact, while I'm here I'd like to thank Incroyable for all the work you have done. David