Custom Stock Status

or search frequently asked questions:

How to Use "Rules for Quantity Range Status"
Can I have different stock status for the same SKU depending on a store or website?
Can I import stock statuses for my products?
What product types are supported by this Custom Stock Status extension?
Can I display separate stock statuses for simple products which are part of configurable one?
Can I send “back in stock” alerts to customer who have subscribed to out-of-stock products?
I installed your Stock Status extension but I don’t see its options on the frontend. What’s wrong?