But can you actually get a plane to fly below descending 1g stall speed while making it descend?
Humm thats an interesting question...
If it's descending at a constant rate (so the pilot feels 1g) then the wing must be providing the roughly the same lift as it does in S&L flight. In which case the speed will be roughly about the same but it can'r be slower.
Therefore if you ARE flying slower than the S&L stall speed you are not only descending but your rate of descent is increasing. You could argue that this isn't flying - it's falling!