Do you still have those receipts? If so give a copy of them to the adjuster along with an estimate on how long it took to install each to increase the payout amount. Hope you had full coverage, if so and you have a decent insurance company they should go ahead and let you take care of the car rather than waiting on the other insurance company to decide they've held the money long enough. And, if the other insurance company gives you grief tell them to bugger off, that you're going to fix the car yourself and sue the other driver for the damages including your medical issues since you've had a stiff neck ever since the accident.
Incidentally, a sideways impact at speed is far more damaging than a header. My wife's accident (that led us to buy the LS) was where she was going under 40MPH and a woman pulled out of a parking lot into the road hitting her in the rear side. The damage to her mail truck was almost unnoticable, they didn't have to fix it to put the mail truck back in action, but the wife was another story as it resulted in a destroyed disk, a spinal fusion and years of pain to date. Get checked out, and if you feel like you pulled anything get a neurosurgeon to evaluate you. You don't want to be in the same boat my wife's in.
Good luck, and I hope that the only damage in this accident was with the car.