The feature for adding Vista's boot loader to any chosen drive doesn't seem to be working.
This problem arises when people want to change from dual booting Vista and XP to only booting Vista.
If you set up the dual boot in the usual way, by running Vista's installer on a machine which has an existing XP system on one disk or partiton and space for Vista on an empty hard disk or partition, the Vista installer writes its boot files on the XP drive.
If you later remove the XP drive, or reformat it, Vista cannot be booted - even if you change the boot order in the BIOS to boot the Vista HD first (or in the case of two partitions, make the Vista partition active).
I tried using VBP to create a new Vista bootloader on the Vista partition. It seems to be working and VBP reports that it did the job successfully, but when you check with a file manager there is still no bootmgr file or boot folder on the target drive - so it is still not possible to boot the Visat drive directly.