Newbie catalog question

Hello All, I'm having trouble getting catalog files to chain. I've searched the forums & gone through the documentation but can't find out how. I've got three catalog files - 10.7_Vanilla.catalog, LionExtras.catalog and Software.catalog, which all reside in ~/Instadmg/addons/InstaUp2Date/Catalog files LionExtras.catalog has include-file: 10.7_vanilla.catalog, Software has include-file: LionExtras.catalog I was under the impression that just by having that include-file in LionExtras and Software.catalog that it'd get added? Or do I have to run a different command than [code]sudo ./instaUp2Date.py -p 10.7_vanilla.catalog --instadmg-scratch-folder /Volumes/OSX[/code]? Thanks in advance,