Create a custom welcome page for new fans.

1. Use Facebook as yourself (not as page)
2. Create a folder on your server called iFrames.  Add your index.html file and images to this folder. Publish to the web.
3. Create your iFrames page by going to http://facebook.com/developers
4. Click on Set up New App. Name it and Create.
5. Edit info on the About tab
   
6. Click on Facebook Integration. In the  Canvas URL field, enter the complete URL to your iFrames folder on the server.
7. Disable discovery.
8. Under Page Tabs, name the page “Welcome.” and choose iframes. The tab URL is index.html. Click Save.
9. Click on the Application Profile Page link on the right side of your application page.
10. On the left, click on Add to my Page.
11. Choose the Page .
12. Hit Close
13. From your Fan Page, click on the Edit Page link.
14. Then click on Apps and find the application that you just added.
15. Click on the Edit Settings link next to the app and Add link.

Thanks to:

http://www.hyperarts.com/blog/adding-iframe-application-to-facebook-fan-page/#ixzz1Ev8rU5CN

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