Yes & No.
You can name the actual bin file anything you like in the txt file within reason with '.bin' extension, and 'xrgn' is the correct command in point 15 to write back [restore] rgn41, provided of course the correctly named file is invoked whether that be 41.bin or backup_41.bin or any other name with the correct path for it's location, e.g. xrgn,41,1:/original_41.bin for instance.
The file used to write back is usually placed in the root of the card for convenience NOT in the xxxx [hwid] folder, so taking your example in point 16 the command in 15 wouldn't work because the file needs to be in the root for it to be executed.
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