on submit form filters

In version 1.4 I used to be able to modify the form object and modify the fields with their id's like such:

add_action("gform_pre_submission", "liberal_handle_forms");
function liberal_handle_forms($form_meta){
$form['5.2'] = 'foo';
return $form_meta;
}

But that doesn't work anymore, I can't seem to find the results anywhere. Neither in gform_pre_submission or in gform_pre_submission_filter.

The current documentation doesn't seem to refer anywhere on how to change the values of fields before saving them, Am I looking at the wrong place?

Thanks,

-Steph

The problem is that it doesn't seem that the form object is the same as it was before. And the documentation makes no mention whatsoever of being able to set the fields like such. It seems like the form object is different depending on the context. I was getting it looking like this:
http://pastebin.com/hmjvSa1f
where I can edit values, and I can edit values of admin only fields. Something it appears I cannot do in the documentation you refer to since it refers to changing the values of the fields by changing the values of the $_POST superglobals.
While it now looks like this: (this is the one that resembles what the documentation refers to)
http://pastebin.com/iT6a2KWB

The documentation doesn't seem to mention how to modify admin only fields, Do I need to make all fields publicly viewable?
Are there any plans to enhance the documentation?