Okay, another question. lol. :)

How do I make it so I don't get user registration e-mails?

If you're on XOOPS 2.0.x, select -
- System Admin
- Preferences
- User Info Settings

Select 'No' under the option "Notify by mail when a new user is registered?".

If you're on XOOPS 2.2.x and you have Extended Profiles installed, select -

- Preferences
- Extended Profiles
- General Settings

Select 'No' for the same option described above.

If you're not using Extended Profiles in 2.2.x, the option may be located under a different submenu...not sure where though.