I tried bcdboot but couldn't get it to work. Following another user's suggestion I tried the additional step of using the Windows 7 Disk Management tool to set the partition status to Active. This didn't resolve the issue either. Running bcdboot again after this step had no result.
Someone...
OK, I've pretty much figured out by now that on my system the MBR is located on the drive with XP-Pro. See image from the Disk Management tool below (the Windows 7 drive is labeled "BOOTCAMP"). So the Mac cannot see the Windows 7 installation unless the drive with XP is in the bay.
Booting...
I have a Mac Pro (early 2008) with 4 internal drives. About a year ago I did a BC installation of Windows XP Pro on one drive, and recently I did a BC installation of WIN7-64 on another drive. The drives are:
Bay1: 1 partition: SL (Mac OS Extended Journaled)
Bay2: 2 partitions: WIN7-64 (NTFS) /...
