Using ImDisk to load an image file for temp purposes, junctions, Windows 7 64bit

Hi,

I just wondered if ImDisk can be used for the following scenario:

OS: Windows 7 64-bit

When the OS boots, C:\ramdisk.img is mounted as R:\

A junction on my hard drive "C:\Users\User1\AppData\Local\Temp"  targets R:\Temp

On shutdown, the contents of R:\ is saved to c:\ramdisk.img

Thanks.