droboPro MPIO in Windows 2003/2008

The droboPro BPG (Guide) is certanly helpful for us to integrate our Pros w/ VMware ESX/ESXi 3.5 but when will there be the one for Windows Server & Hyper-V? Is it still not supported in this firmware version? Don’t understand why it works in VMware but not in Windows. TIA for any feedbacks.