Force immediate saving

I hope you guys can help with this. This is for an online writing class. The content type is called "writing".

Here's the scenario: User clicks add/writing. The node/add form opens. At this point I need the node to save itself.

I think Rules has the tools I need for this, but I can't figure it out.

In old forum threads I have seen references to an action called "add new content", and a rule called "save a content" which gives you an option to "force immediate saving".

This is exactly what I need, but I don't have "add new content" as an available or advanced action. I'm using Drupal 6.20.

Can anybody help? Or alternatively, is there another way to force a new node to be saved as soon as it is created? By the way, my users don't need to edit the form at all. Everything is done through comments.

Thanks for any help.

Michael