I have a stand-alone Hyper-V 2008 R2 server and I needed to copy ISO files over to it. After a short search, I proceeded with the following commands on the Hyper-V box:
netsh advfirewall firewall set portopening ALL 139 “Share1″
netsh advfirewall firewall set portopening ALL 445 “Share2”
After a reboot of the Hyper-V server, I could browse to the C: drive of the server, create a folder and copied across the ISO files needed to create the new servers. Yay!