Hi KP,
Are you trying to create the root node of a BO with that form?
If this is the case, you can create a similar application to the one describe in the document above.
Including the initial screen (you can use the same UI to create and to display the object).
When you want to create an instance add &CHANGE_MODE=C&SKIP_INITIAL_SCREEN=X (add this before the '#' char at the end of the URL) .
If you are trying to create a sub node (node other then root) the UI needs to be modeled differently.
BR,
Matan.