ok i managed to do myself cos this thread looks dead ...many unanswered questions.
Maybe i'm not so retarded as i thought huh....
after all i learn something...
everything is working now even the complete ibrowser and not only the insert image button.
Just i can't figure what does the filebrowsercallback stands for and how to implement it into zen if some compassionate soul could enlighten me whith some example i'd be grateful

thanks