OK, I'm taking the easy way out with this. There are some good SUSE/openSUSE installation guides already available, so I'm not going to reinvent the wheel here.
I've always had a hard time finding any great SUSE-specific installation tutorials; there were plenty of reviews that had a few sentences about the installation, but nothing I could point a new user to and say, "This is how to do it" (come on community, let's not get lazy with the support). SUSE has made this so easy that there really isn't too much to talk about, but when you're new to Linux, you can't read too much. The retail versions all come with huge manuals and installation guides.
If you've not yet done so, check to make sure your hardware is compatable. It might also be a good idea to write down the model numbers of your hardware in case SUSE does not detect it properly.
If you are attempting to install SUSE as a dual-boot, back up any essential data on your hard drive. SUSE is very good about repartitioning your existing hard drive and operating system; but whenever critical data is involved, Murphy's Law is in full effect.
Houghi's Experience SUSE 9.1 Installation (archived copy) A lot of great screenshots here, new Linux users may need more detail than what is provided, though. This guide was written using a disk install.
Newbie FTP install Guide Very detailed, well thought out SUSE 9.1 installation guide for the FTP method; no screenshots.
openSUSE Installation Guide Nice guide(s) created by lots of great people. You should be able to find answers to most of your questions here.