Webform API

I am just facing the need form something that I believe it's not available and I think that webform can very well fill that gap, i want to hear some thoughts from you.

Specifically, I am creating a booking module that will work against an EPOS system. For the booking process I am building a multi-step form (but not using drupal FAPIs for that, but a rather own-style multi-step with $_SESSION). It's going to be a three-step form, and while I want total control over the first two, it would be great to have the third one somehow flexible and configurable by the user. To do that I would like to use something existant. I already tried using CCK somehow, by retrieving the node form manually and trying to emulate all what drupal_get_form() does but on my own controller but it started to seem too complicated.

As a second alternative I thought of webform. Because this is not really a node-based solution I thought it might work, although before really going so deep on your module I want to share this idea with you. Ideally, what would be great, is to have an api in a way I can create a webform using the UI of the module and then, use it on my own module and relate it, instead than to a node, to some internal ID.

In a very rough way, I am thinking of something of the following:

example_page() {
drupal_get_form('example_webform');
}

function example_webform() {
  $form = webform_load('webform_nid');

  return $form
}

Where I can have webform process the information or I can even have my own submission code where I might want a different or additional processing.

Any thoughts?

At this point I will create the form myself in the module without any flexibility whatsoever.

Thanks,
a.=