The doctor, sorry if you haven't understood me well, I can't speak english well.
What I said about the resistor, was that I tested my diode in the flashlight (the lantern, read the instructables link i post) which outputs 2.4V from 2 AAA batteries, 1,5V each one. To do that I think ther's a resistor inside the lantern's driver. Can you understand me? So ther's already a resitor in series with the laser diode, just what you say in your post, but not the correct value. And please, translate this phrase into simple english "Don't ever rely on a battery's internal resistance to protect a diode.", I can't understand.
(i think lantern's bulb is about 100 mW). (I can't explain well in english, uderstand me)
And with the die4laser driver, I didn't see details because, when I started to read the main page, I saw something for an IR diode, and I thught people weren't undertsanding me.
Sorry, as you can see, I speak english as bad as a dog.
I just wanna learn, I read your post with interest, you can trust me. And If my post was offensive, I apologise. I was very angry because I blew the diode.