Hi Gary,
the only thing you need is running and properly configured scheduler. Then you can use publish from and publish to properties of your document and document will be published and archived automatically. You must have in section CMS Site Manager -> Administration -> Scheduled tasks, then you should select Your specific site there and there should be task called Content publishing, which is running without errors.
On the following screen is detailed image with settings of mentioned scheduled task.



Best Regards,
Zbysek Nemec