I think I have a decent handle on this concept, but something seems lacking, I hope someone can clear it up :) So, let us say I have an object, call it a Member. :) And let us say I want to be able to add a property sheet to it in a customizer/specialist. AIUI, I should be able to add a persistent sheet provider, give it the name I want for the sheet, and define the sheet? Geex, the more I write what I want to do, the less I feel I grasp it. :( Basically, let me put it this way: I have DataSkins (ZClasses). I have one or two property sheets that I want most/all of the DS objects to have. I don't want to have to define the property sheet in each and every ZClass. AIUI, PersistentSheet providers can do this. I want to do it with the default ZPatterns/LoginManager includes. So, am I totally clueless, or am I just looking to hard, and missing something blatantly obvious? -- Do not meddle in the affairs of sysadmins, for they are easy to annoy, and have the root password.