In Windows 7, Native VHD boot is currently supported only on Ultimate and Enterprise versions and is disabled by a license policy on other versions of Windows. This article/tutorial shows how Native VHD boot can be enabled on unsupported versions of Windows 7 as well.
CampTune 7.5 for Mac® OS X – a handy utility that easily redistributes disk space between Windows® and Mac® partitions.The software, normally priced at $19.95, will be available for free from Paragon Free portal till October 4
Microsoft has officially released an Update for Windows 7 that allows users to install XP Mode on computers that do not support Hardware Virtualization.KB977206
When you boot an unattended Windows DVD(which contains autounattend.xml), you are directly taken to the installation routine.There is no option to launch the recovery environment.However I found a way of accessing Windows Recovery Environment.
The GUI of VirtualBox does not have an option to boot a USB drive (Physical Drive) in a virtual machine.
However you can attach a physical drive to a virtual machine using a command line tool that is bundled with Virtual Box.You can then boot your virtual machine from the attached Physical drive.