I realized that this is old and you may never get it. But nobody answered you on it, so I will give it a shot.
In terms of handling the default setting I am not sure.
But you can do something with the below Automator Action. Here is the Automator action you need. It's called "Unlock Finder Items" You can get it from here:
There is a Finder Automator Action pack that you can purchase (really cheap) to get this action and about 20 other awesome actions.
See below service:
I tested it and it works great.