help with enabling universe

[mike coulombe]

Hi, I am trying to enable universe so the apt-get will see things like lame and dosemu.
On the site the following is listed to do this with out editing files manually.
   Adding Extra Repositories
To enable the extra repositories:
X-Antivirus: avast! (VPS 0639-2, 09/26/2006), Outbound message
X-Antivirus-Status: Clean

Open System->Administration->Software Properties .

Select Add

To enable the Universe repository, check the Community Maintained (Universe) button.
   In the new version I have there is no software properties.
Is there another place to do this with out searching for files to edit.
I see software sources, but this doesn't work with orca.
I had a sighted person look and they didn't see a add button there.
   Thanks Mike.