Hello Javier!
The jik tek (straight kick) is one of my favorite attacking tools! It is delivered in a quick, upward snapping movement and the impact occurs with the toe or the instep. Since Jeet Kune Do is a shoe art, it allows us the benefit of kicking with the toe! Now, the other kick you mentioned is dum tek (stamp kick) and falls into a different category!
It is best to start off working the form in a kick, just kicking air. Learn to put the necessary footwork with the kick. Then, once you have the form down, start working to develop speed. then, and only then, should you add impact training. Impact training will vary from hanging paper (speed and accuracy) to focus gloves (various combinations, target heights and moving targets) to the heavy bag (power and penetration). My guess would be that this is how Bruce Lee did things! It is practical, effective and scientific, just like Jeet Kune Do!
As for photos, I already had those that you sent me, as I have a HUGE collection of rare Bruce Lee photos. My problem is that (1) I do not have time to spend scanning my photos to send to others and (2) I take very good care of my books/magazines, and would not bend them to put them on the scanner anyway! I do occasionally run across things that are well worth looking at on the internet, which is where "copy and paste" and "save as" comes into play!

If I see anything you might like, I'll try to snag it for you!
Keep Blasting!
Sifu Lamar M. Davis II
Senior Instructor
Hardcore Jeet Kune Do
Sifu@HardcoreJKD.com
http://www.HardcoreJKD.com
Kwoon (205) 274-9011
"Hit Hard, Hit Fast, Hit First - ALWAYS!"
"What is Jeet Kune Do (JKD)? Chinese martial art, definitely! It is a kind of Chinese martial art that does away with the distinction of branches, an art that rejects formality, an art that is liberated from tradition." __Bruce Lee