Here you go guys. I've found this is a common problem for our 240 verts, so I'd like to share this info.
This is my driver's side and as you can see plastic piece is still in good condition.
The plastic piece gets worn out and you will lose it eventually. If that happens, your door won't close perfectly and interior light will go on and off. You can wrap the latch with electrical tape, but trust me. Over the time, it goes bad again and you have to redo it. Also, you have to wrap it just about right. If it's too thick, door won't close. If it's thin, door will be still loose.
This is what I found from Ace Hardware store. It's called Nylon Sleeve. I think I paid $0.50 for each something like that.
You cut the middle like this with a knife or Dremel, spread it and plug it to the latch. It's very strong yet flexible enough, so it won't break. But, you should buy a couple of extras just in case. This sleeve is strong and durable, so it should last forever. Actually, this plastic piece has been on my car for several years now, but it doesn't look that way.
Turn it a little bit, so you can have a clean look.
Now you can move these pieces around and adjust the door. If you wear rubber gloves when you tighten these screws, you can have some extra grip.
My door didn't line up correctly, so I moved those pieces around.
Push the interior light switch and make sure it works properly. If not, you can replace it easily since only 1 screw is holding it. That's about it.
Modified by 94_240sx at 9:22 AM 10/3/2007
I am gonna go and do this tonight. 
