Need insurance info. Full Coverage or Liability? Sounds like you have Full Coverage.
You can claim 1 year of modifications on the car with reciepts if you have full coverage.
3 Options if the car is safe and drivable...
1.Total the car, have them take it, and take their check.
2.Keep the car clean title, only taking part of what they would pay out, and repair the car with the money.
3.Have them find you a like kind quality car.
(Apparently I typed a little slow tonight, none of the above was there)