Native VHD boot is currently supported only on certain versions of Windows and is disabled on other versions of Windows. This article/tutorial shows how all versions of Windows 7 can be installed and booted from a fixed size VHD using a free driver called Firadisk.
Bootice is a small tool or utility which can modify/backup/restore the Master Boot Record(MBR), Partition Boot Record(PBR) of your Disk.It has both Graphical User Interface and Command Line Interface.It is an all in one tool and supports many boot managers.
Grub4dos it is a versatile bootloader capable of dual/multi-booting DOS, Windows, Linux and other operating systems. It can be used to select which operating system to load when multiple operating systems are available.Grub4Dos can be easily installed to your Hard Disk Using a tool called Bootice.