your windows part was missing b'coz u didn't noticed that your Suse did some resizing process with your windows partition. So better take care of it next time.
What a great "feature" ... maybe i should go back to the first distro i tried some years ago after all ;-) Reminds me of that guy who created a linux distro that looked for windows in order to erase it without any warning.
The good thing about having a /boot partition is that it's much easier to solve boot problems when they occur (after a new installation for instance). Then you can install grub/lilo on the partition of whatever linux os you're adding without risking to destroy your functional Grub on the mbr, all you have to do is update your menu.lst to reflect the new configuration.
The advantage of the 2 disk setup is that grub doesn't necesarily have to overwrite the mbr on the windows disk, so no more need to restore it if something goes wrong...
If you have the option to choose which disk to boot from in the Bios, use it!!!
First install windows on the first disk, then tell Bios to boot the 2nd disk first & install Linux on that disk & Grub on the mbr if it's not done already. However you'll have to use the swap command in menu.lst for grub to find the correct disk to boot Windows & the hard drives' notations must be adapted too, just experiment in the grub shell & you'll get it.
If the bios can't select which disk to boot you can achieve the same result by placing the Windows disk as slave once installion is completed & then installing linux on the new master.