There is a tutorial on this site to create a windows 7 recovery partition ( sort of ).
You went for a better method - and I would do it differently as well - however, the tutorial is a simple way that most people could manage.
It is a straightforward idea that is well known and has been around quite a while.
Severed took the trouble to write it up here
Recovery Partition - Create
I understand why you hadn't come across anything - that kind of thing is not so common on "general" windows forums, or laptop forums.
However, those of us who are interested in creating portable windows, building winpe images , installing to usb drives , etc - hang around more specialist forums. There are plenty of methods in these places. Some people have even written apps. to do it for you. They are not particularly simple, though.
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it's USUALLY successful ..mark the restore partition as active, forcing the system to boot to that partition.
Yes that often works.