I don't know if you have found how to get the Microsoft Broadband Utility installed yet but here is what i came across on the microsoft usergroup
Goto
http://www.microsoft.com/hardware/broadbandnetworking/15_Downloads.aspx
Select MN700
Download the msbndownload.exe file
Run the msbndownload.exe file
Accept the EULA
Save the files to "C:\MSBBN"
Once the files are extracted, cancel the setup.
Goto C:\MSBBN through Windows Explorer
Right click msbn.msi and install it.
After you install it, the drivers will be in (if you keep the default msbn
install directory) C:\Program Files\Microsoft Broadband Networking