I just thought this might help some else out.
First you have to unhook all the cables under the driver side floor board, then what I did was use a pair of needle nose pliers and a slid them over the cable where it comes though the floor brace and hit it with a rubber hammer to get the cable back through. Sorry no pics of that part.
Then I went under the dash and removed the return spring from the pin.
Then I removed the little cotter pin from the same pin that you had removed the spring from. Then you remove that pin also. After that I removed the bracket that held the cable in place, freeing the cable from the parking brake handle.
Once I had freed the cable inside I went back to the engine bay and pushed in the 3 little prongs that held the cable on the firewall and pushed the cable back inside the car. Once that was done I went back under the dash and pulled the cable the rest of the way through the firewall and that is all. I know it's not much but I know I had no clue until I crawled under the dash and started to unhook stuff. I hope it helps someone.