Split volumes on a VHD?

Hi,

I have one 300Gb VHD file containing C: (O/S 100Gb) and D: (data 200Gb). How can I extract
each of those volumes so that they reside on individual VHD's?

So, i want to go from this:

1 x 300Gb VHD C: (O/S 100Gb) and D: (data 200Gb)

to 

1 x 100Gb VHD C: (O/S)
1 x 200Gb VHD D: (data)

Is there a tool to do this or via powershell?

Thanks