Add Boxes to the Wall Sidebar of Your Facebook Page

Here are the steps to adding a left sidebar ad/button/image to your Facebook Page wall:
1. Click the “Edit Page” link on your Fan Page main page
2. Install the “Static FBML” Application from Facebook.

• Look for the “More Applications” box at the bottom of the edit area.
• After you search you should see the “Static FBML” application in the search results.
• Click on the “Static FBML” link.

3. Add the Static FBML application from Facebook to your Fan Page

•    Click the “Add to my Page” link on the Static FBML page.
• After you click the “Add to my Page” link you may get a selection popup that asks which Facebook Page you want to add the application to. Just click the “Add to Page” button for the appropriate page.

4. Add content to the Static FBML application

•    Now you need to get back to your Facebook Page that you just added the Static FBML application to and click the “Edit Page” link again. 
• There should be a new box in the middle of the edit page
• Click the “Edit” link.
• Now you will see a very simple editing interface with “Box Title:” and “FBML:” fields.
• The Box Title is just text, but the FBML field can take HTML or FBML.
• Insert the your code into FBML field:
• Click “Save Changes” at the bottom. 

5. Move the new FBML box to the Wall page

•  Go back to your main Facebook Page tab. Then go to the “Boxes” tab. You should see your code 

Thats it.