Installing to a second drive is actually the most safe and the easiest way to go. That's how I do it and I have three hard drives in my computer.
Since Ubuntu is on your master drive you need to edit that 'menu.lst' file under /boot/grub If you have installed Opensolaris on your 2nd drive, you can chainload this OS by adding this command in your Ubuntu 'menu.lst' file: title OpenSolaris root (hd1,0) chainloader +1 This command does nothing more than jumping to your second hard drive where the boot procedure of any other OS can start. This message posted from opensolaris.org
