forms element builder

I am not exactly sure this case could be a feature request for the elements module, but if i am not wrong the idea behind is the module is an element builder module and form elements could be part of it

i have posted previously the scenario below for help on the general section of the forums

basically

To combine two content types created with resulting those multiple contents created individually from the same submission

example usage case;

VENUE is a content type
FILM is a content type

and CCK nodereference field relating both on the same submit form

so for a screening view user submits both on the same page instead of submitting them separate forms than try to link them afterwards

a SCREENING is can be a built form element

submit a SCREENING
--------------------

VENUE (a content type)

>

screening (CCK .nodereference)

>

FILM (a content type)

--------------------
[submit]

so, the results of viewing a FILM refer to the VENUE screened
verso versa
viewing the a VENUE will present all the FILMS screened on that venue

whole point is to achieve it with only 1 submission,
could it be a case for the elements.module -a form elements builder ?

thanks