L’outil de conversion des images .WIM vers .VHD est disponible en RTM (wim2vhd)

c’est ici https://code.msdn.microsoft.com/wim2vhd

The Windows(R) Image to Virtual Hard Disk (WIM2VHD) command-line tool allows you to create sysprepped VHD images from any Windows 7 installation source. VHDs created by WIM2VHD will boot directly to the Out Of Box Experience, ready for your first-use customizations. You can also automate the OOBE by supplying your own unattend.xml file, making the possibilities limitless.

Fresh squeezed, organically grown, free-range VHDs - just like Mom used to make - that work with Virtual PC, Virtual Server, Microsoft Hyper-V, and Windows 7's new Native VHD-Boot functionality!