To start with u need to download/get the os software. I reccomend you to download the same from the following site:
http://software.opensuse.org/
its for Suse Linux 11
it would be better if u can use some P2P software(like bittorrent,Vuze) to dowload. There are lots of seeds and thus it will download in a day (broadband speed)
burn the downloaded content to a dvd (iso image)
and then u can boot the system from dvd and start installation
get back in case of any issues