Dynamic form generation

Hi,

I need to generate forms dynamically. A form is a collection of controls 
(input elements, grids, buttons). The exact composition of the form 
(what elements it does include) is known only at runtime (it changes).

I came up with the following approach:
My FormModel should have an item elements that returns an iterative 
model with the form elements. Those elements are components. The problem 
I currently have is that components should bind to html nodes that my 
template doesn´t have (I only have a <span id="Form">[Form]</span> 
node). How can I import those nodes (I do have additional templates for 
each element (text, select, grids, etc) that I want to use) into the 
master template. Models return strings, components or nodes. I want to 
return processed nodes or components that generate their nodes by 
importing them from other templates.

Perhaps there is another aproach that I haven´t thought of.

Thanks in advance,
Martin Paoletta