I still don't understand what problem this bug is trying to describe now. brasero allows you to configure the location of temporary storage, which you have managed to do. What doesn't work now? It isn't obvious from your description.
I don't understand what you mean by "putting the drives key in the gconf database". gconf is a configuration backend, and /apps/brasero is for specifying configuration options specific to brasero.
I still don't understand what problem this bug is trying to describe now. brasero allows you to configure the location of temporary storage, which you have managed to do. What doesn't work now? It isn't obvious from your description.
I don't understand what you mean by "putting the drives key in the gconf database". gconf is a configuration backend, and /apps/brasero is for specifying configuration options specific to brasero.