In fact, a lot of people will injure me after that, but i know some other will love this post.

I soldered a cable to my raspberry pi 2. Yes i did it.

(more details here : http://www.instructables.com/id/Raspberry-Pi-2-Quick-n-Easy-RCA/step4/Alternate-Method/ )

With this, all you have to do after is to make your raspberry display the system with the composite display (no hdmi).

My config.txt (in the raspberry sdcard boot partition) :

http://shorttext.com/7e7500cf

(comment links are dead)