Shmoo on "How to add functions to the Media Uploader?"

When I upload an image to be included in my posts I would like to add two extra alignment option to the drop-down list.
http://i.imgur.com/o0P7GqU.png

Default we have:
- Left
- Right
- Center
- None

But I would like to add the SuperLeft and SuperRight options to this list.

Is something like that possible through WP filters?