A System family can have project parameters applied to it. These are schedulable. You should be able to do this to system families. You will NOT beable to save these out indivually, so it is suggested that you transfer these into your template so you they will be available in future projects. You'll have to re-create the project parameters in your template, and any project not started with this modified template, since project parameters cannot be "transfered" from one project to another.
Scott Womack