OpenIndiana overwrote my MBR so I can no longer boot Windows. I want to dual boot the two systems. It seems grub4dos doesn't support ZFS (but I think I can get a copy of the MBR that OpenIndiana installed into my disk and chainload that from grub4dos). Grub2 supports ZFS and there is a Grub2 distribution that could be installed to the MBR from Windows.