Mimi05srt6
'I'm sure we could be handy ourselves and create some kind of tie down to keep the spare in place.'

You see my point, no one mentions holding the tire down. this tie down would have to be similar to regular methods, which may be tough to do.
After all who wants to be overtaken by their own tire inside the car.

shapeshifter309
I would imagine that the sidewalls of your tires are pretty damaged, maybe to the extent of rubber 'dust' floating around inside, it happened to one of my tires when it slowly went flat and my hand hid the TPS light on the dash. The tire was scrapped as there was a good handful of 'dust' inside the tire. I hope you had the inside of the sidewalls inspected, these could be dangerous to you and others. Radials are notoriously weak when flexure of the sidewalls occurs like this. As long as the rim does not touch the road it would be OK, the tire is a different matter.