I finished the main story of Dawnguard an hour or so ago, after thoroughly enjoying it, and decided I wanted to play on my other character. Unfortunately, I didn't do a proper save, just a quicksave, to save my main character's progression, and by the time I realized this, I have overwritten all three of my previous autosaves and one quicksave. Long story short, I'm back to recruiting Isran's two buddies and almost at the beginning. Given how I dumped a fair bit of hours, including that long-ass grind to Auriel's Bow, I'd rather not have to start back at square one. So, I've got two questions:

1) Is there any way to dig up old autosaves or quicksaves? That would save a LOT of time.

2) Can someone give me a brief walkthrough of how to complete the main quest again via the console? And I mean fully complete, like having Durnheviirs shout, Auriels Bow, Serana as a companion, all that jazz, and end up the same way it would be if completed normally?

Thanks a bunch.