A given version of opensuse is only supported for two years from the date of release. IIRC suse 10.1 was released in the spring of 2006 so it's rapidly approaching its end of life. You would be much better off downloading and installing the most recent offering from suse, 10.3. The newer version will have much better hardware support as well. Note, updating 10.1 will not give you the same system as a fresh install of 10.3 and come this spring, 10.1 will no longer get security or bugfix updates.
You do not need any antivirus software when running linux. Viruses on linux are practically nonexistent. You are more likely to win the lottery than get a virus infection on a home linux desktop setup. There are antivirus applications for linux but they are primarily used on linux file servers and email servers and they are there to protect the windows boxes that access these servers.
Linux can install on pretty much any type of hard drive or hard drive partition. Your spare sata drive should be fine for suse 10.3. You could possibly run into problems with suse 10.1 as sata hard drives were not nearly as common back in 2006 and the kernel used in 10.1 may not have support for your sata controller.
Last edited by kilgoretrout; 01-22-2008 at 09:23 AM.