Ok thought maybe I should post here, since I'm actually asking about v4 issues.

Assuming I'm using the kuroi version that Diva Vocals suggested was most stable,
- what does it do when product is out of stock? I've already experienced that it doesn't show it, and that it shows it in the cart, but
a) is there an option to actually state that it's out of stock prior to the cart? I don't actually need quantities shown - but out of stock vs in stock would be useful! or
b) once it gets to the cart, will it allow the person to backorder the item, and notify me that it's a backorder so that I know the person is aware that there will be a delay in fulfilling the order.

Thanks if anyone can help!
Regards
Sunali