CCK imagefield

Over the last few days I have been trying to figure out how to properly use the services node.save function to save more than just a simple content type such as story which has just a title and a body. This I can do w/o any issues. The issues that im trying to figure out is when you have a content type lets just say only these fields right now

content type photo
* title
* body
* field_my_photo -- cck imagefield

--- fid i already had from file.save

Hello,
Reading about Face.com's new open API, I got a strong urge to jump on the new capabilities and make it happen for Drupal.

As I see it, several features can be done to make it very interesting:

And so on...

Is there a way to check if a file or files have been uploaded in a content type? I'm trying to determined if a picture has been uploaded.

I have tried to check if a filefield contains a value, but I am getting an error message that my argument #2 is not an array in the cck content.rules.Inc file.

Any hints? How can I do that with php?

In a project, I have 2 content_types (A & B), each one having a CCk imagefield defined (not shared).

I need trigger a rule that I will change the content type of a given node (from A to B).

During that operation,
I need to gather the data stored in the the CCK imagefield defined for Content_Type A (ok, this is done before content_type "upgrade").

Then, I'm wondering what is the best practice to store those data in the CCK imagefield defined for Content_Type B.

To keep in simple, I plan to have 2 imagefields setup with the same parameters, but the name.