D6.22 - attach content to node type
This is actually pretty easy.


Edit your content type (or clone to a new type).  Add in a noderefernce CCK field as needed.  Configure it for not mandatory, but limited to one value.
Edit the fields for the type so that they are all hidden.
Add a preprocess_node for your content type in template.php to read in the node relationship, theme the node, and then add it as a theme variable.
Create a node template for your type.
Edit the node template, to add in your div in the markup.
Print out this theme variable in the node template.


This should get you down the right path.