I have a 97' 200sx and, I cant use a slim jim on the lock rails are on the inside of the door panel. The way a lock smith will open your doors is take a wedge in the seal of the door and, make enough room for a long pole thing to fit in it and push your Unlock/Lock button on the door panel if your lock are the same as mine.
^^^Yeah, I had to do the same thing when I locked my keys in the car...lol.
After that, I made 2 spare keys:
one kept safely in the house
one inside my wallet since I leave my wallet in my pocket everytime.