I'm trying to modify a course (from the course module) and a product (from ubercart). I want to remove the SKU (right now I'm just testing how to remove the required bit) and a few other fields as I'm selling only online products. I'm not great at using hook_form_alter() yet.
I'm trying to follow this tutorial, http://www.ubercart.org/comment/8749/Re-Removing-SKU-product-edit-page and I'm not quite sure where he is getting
$form_id == 'product_node_form' - is that related to the content type?
I'm trying to do this on a course content type, so if so, that would explain why it isn't working for me.