In YaST / Software / Software Repositories / Add URL then:
Uncheck:Download repository description Files.
For Non-Oss add URL: "http://download.opensuse.org/distribution/12.2/repo/non-oss/", Named: openSUSE-12.2-Non-Oss.
For Oss add URL: "http://download.opensuse.org/distribution/12.2/repo/oss/" , Named: openSUSE-12.2-Oss.
Uncheck:Download repository description Files.
For Non-Oss add URL: "http://download.opensuse.org/distribution/12.2/repo/non-oss/"
For Oss add URL: "http://download.opensuse.org/distribution/12.2/repo/oss/" , Named: openSUSE-12.2-Oss.