Check out setupgrubfornfsinstall. It’s a dialog based shell script to prepare remote network installations. It was primarily made for use in LANs but now also supports direct installation from opensuse.org. Just run the script, select 11.0 and it will download the kernel and initrd used for installation. After that it adds an entry to your boot loaders’ config file with proper parameters. Reboot, select the new entry and the installation starts.