Okay Thanks but thats what i already know

I just want to know how i am able to get these ids and icon_file_name and so on from the client

-- So when i want to add a new Item i need the correct id and the correct icon_id_filename.... But wheres a List of that or something like tis?
Can i get this out of the Client Data?
Thx For your Answers,
and sry about my bad English
Turtlefight