The code requires you to set up a free account at socialtwist.com. This allows you to track uses of the module (analytics).
The latest version, 4.5, will allow you to use the module on SSL pages without errors in IE6. In addition to that, you can create and enter your own custom images.
If you love this module please, please leave me reviews! They are a joy to read. Also feel free to email me for suggestions or any help you may need with using the module.
Also, When I needed to embed the Tell a Friend within an article, it was very easy and simeple. I made an account at socialtwist.com and within few minutes, I added it to all my articles! A great tool that every webmaster needs!
I plan on putting together a plugin that will do this for you very soon.