What you are suggesting is not bad on the one hand, as I personally see it. If a person made a mistake with Jack's quest, he will still have a chance to try again, albeit in such an unconventional way, but it is better to make a strong-willed decision and either continue playing or start over and make the best choice.
The console and what you are suggesting is not exactly what Styg wanted from us when he came up with this quest and implemented it into the game. There is something wrong with this, I mean using the console or something like that.