The answer for this is: Use the ZS3 restore options.
Loading/saving snapshots is not related at all. We are talking of ZS3s.
If you think it’s related, then you are not understanding the difference between snapshots and ZS3s, and probably you are not using them adequately. I think the user guide explains this quite nicely…
Of course it has. Both Oram and Vangelis have it. @nemoy, you asked the same 1 month ago and you got the same answer. Come on!!