The insurance co. isn't handing out a check for $5600 because they are generous. They have totaled it since, wait for it.................... it's toast. It doesn't need a used door and a $4 can of spray paint, it has significant damage, and is not economically feasible to repair. Believe me, if it could be fixed with a used door and a few bucks in paint work, the OP would of gotten a check for $1200-1500, and be given two options, #1 Take it, or #2 sue us. There is a big difference between buying a car with a salvage title that has had many thousands of dollars in repairs, and taking a check and keeping a heavily damaged car that needs thousands in work, and would be worth less than the time and money invested.
Not necessarily, but with the OP's questions, I wouldn't plan on them fixing it themselves if the B-pillar is bent.
Example, my wife (girlfriend at the time) let her sister borrow her car to go pick up SIL's "mechanic" to fix SIL's lemon POS car. On the way, SIL rearends another car (who evidently had their own problems, because they drove off.). So, car is hammered in the front without collision insurance (bought the car for $350 needing a trans rebuild). We trailered it back and dumped it behind a buddy's building for a few weeks due to me working out of town. When I got back, I found the same car with less crash damage, 50k less miles, for $350 and it only needed a fender that was still good on the SIL wreck.
The car was hit in the RF and the frame rails were tweaked and the PO gave up on fixing it after they put a RF strut on the car (score! new parts!). I took it home, straightened the front end some with a porta-power, slotted the hood hinges to the max to match the crooked front end, set the alignment, and she drove it for 50k miles until someone turned in front of her and was at fault. Insurance paid out $2300, bought the car back from the insurance for $200, and sold it to a circle track racer for $500. SIL still owes us $1000 (KBB value) for wrecking the first car, and it's 5 years later (Bitch!).
Needless to say, I love salvage cars. They look like dollar bills to me.