Hello,
I'm stripping a Fujitsu Siemens B15-1 but i've a probleme with the ffc (too short) and i don't know which model of ffc extender i've to buy.

http://www.monsterup.com/image.php?url=upload/1231587784.jpg
http://www.monsterup.com/image.php?url=upload/1231587575.jpg

Thanks or your help =)

Don't know about that one.
Try this thread: Note on using the FFC extension kits, How to extend...