Well for Windows 9x you can't use the Z: drive as the Network redirector uses that during the logon process.

Have no idea why you would want to create the folder when the user logs on. That means that a user has TOO many rights at a parent folder level which means he/she can create any folder or remove any folder he/she wants at that level. Not a very secure practice.

Then how are you going to allow a normal user to share that folder? They won't have rights on the Server to share it.

Sorry guy, but I think this type of task should be handled by you or someone in your Helpdesk or IT Department.