SuSE 8.2 and Enlightenment
It's been a few months since you asked this, but in case you haven't figured it out or anyone else ran into the same problem:
Assuming you're using the KDE login manager, do this:
KDE control center > System Administration > Login manager
Now, in the Sessions tab you can add a new session type. Simply type "enlightenment" and click add. Save your changes then log out. When you log in again, enlightenment will be in your 'Sessions' drop down menu.