[mingus725]

Just a little clarification to the above . . .

You can add the new disk partitions in YaST Partitioner, but you cannot format them for Windows if you want to use NTFS (and unless you have a good reason not to, you should). All you need to do is go into the bios setup and change the boot device configuration to use the new second disk for boot. Then boot from the Windows installation and it will see the new disk and you can partition/format there however you please. After the installation completes, go back into the bios and switch the boot device back to the first drive.

Then boot into openSUSE, go to YaST Boot Loader, click Other (bottom-right), Propose New Configuration - it will add the new disk to grub's device.map disk list file, and it will find Windows and add a new boot stanza to grub's menu.lst file. It may even do the "map" commands above for you; you can double-check this by clicking on Other/Edit Configuration Files and looking at the proposed new menu.lst - if the map lines are missing, just add them there. Click OK and Finish and you're done.