Hi NoL4U,
You should be able to open your presentation in PowerPoint 2007 and then see the Articulate in the top menu in PowerPoint.
Select that, and then click on the Publish button.
Select the format you want to publish by clicking on one of the tabs to the left and then click on Publish.
That, in a nutshell, is all you need to do but there will almost certainly be other settings you will want to make.
I would check the tutorials on this page.
Articulate Presenter '09 - Tutorials