You can add the second page of your article the way you would add a new page or post in WordPress.
As for the link for the two pages/posts, you will first have to put in both pages/posts. Then retrieve the URL of the second page by opening it in your browser and copying what's in the address bar so that you can create a link to it on the first page. If you also want to put a link to the first page on the second page, retrieve the URL of the first page and then create the link where you want it on the second page.
To create the link:
If you are using our AffiloBlueprint or AffiloTheme wordpress themes and in case you want to exclude the second page from the sidebar you need to:
http://yourdomain.com/wp-admin/page.php?action=edit&post=94andmessage=4
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