Getting wire through the firewall can be real easy, if you just want it to go into the inside of the car...i just installed some driving lights so i had to run 2 wires through the firewall. I used a thin nail and stuffed it in the connectors then with the help of a friend, pushed it through the rubber area being carefull not to puncture other wires. It took like 5 minutes. But getting wires to the trunk is a whole nother story...big pain in the asshole