By "greenware", I mean "portable freeware". It is portable; after running setup, simply copy the installed folder to a USB thumb drive and take it along with you. It runs directly from the thumb. Backup target can be any drive, preferably an external drive, but at least is not on the system partition.
It runs like a breeze, no silly questions asked. Just tell it where to save the backup. On restore, just tell it where the backup is located. Simple and straight forward, no fuss.