Lawsuit seems pointless given her car and it's condition; --
no money there.
Your insurance company is who you have your car insured with. It is they you can hold to the fire to get them to persue keeping you whole by the other insurance company. Otherwise you can come back to them for restitution. Since the other driver was at fault they will persue that avenue if you keep the pressure on them as they don't want to pay unless they have to.
If I'm wrong then someone will correct me.
Your insurance company is who you have your car insured with,
Agreed and they have been great, but not good news either. Fair warning muscle guys and gals, after a few years your mods and car are sharply devalued. Don't drive a even marginally collectable car (as I was) as a daily driver.