Yes See http://www.msfn.org/board/Install-Vista-USB-t111506.html After booting with boot.ini menu, one can select GRUB4DOS Menu with the option to launch VISTA Setup by chainload of bootmgr. It also possible to boot first with Windows PE 2.0 and then run VISTA Setup from a different partition. So conceivably I can partition a 8GB or 16GB stick to contain XP, Vista, Vista x64, is that true? Does that mean a BCD needs to be created on the primary partition of the stick assuming its formatted with NTFS?