You can add services to Open Enterprise Server 2 servers after they are installed.
OES 2 is a set of services that can be either added to an existing server or installed at the same time as SUSE Linux Enterprise Server 10 SP1. After OES 2 services are added, we refer to the server as an OES 2 server.
To add OES 2 services to an OES 2 server, follow the instructions in Installing or Configuring OES 2 SP3 on an Existing Server
in the OES 2 SP3: Installation Guide.