Wow that's a horrible disappointment. I really hope we can get the V700 working with the ini modification, then...
If anybody is brave enough, try editing the RDIF1089.inf file that comes with V 2.02 of the V700 drivers. Find the [Manufacturer] section and change what's in bold here to match:
;---------------------------------------------------------------;
[Manufacturer]
%MfgName%=Roland,NTamd64.6.2,
NTamd64.10;[ControlFlags]
;ExcludeFromSelect=*
[Roland]
;; Windows7 - Windows XP 64
;; not supported
[Roland.NTamd64.10];; Windows8
%RDID0089DeviceDesc%=RDID0089Install, USB\VID_0582&PID_00FD ; VS-700
%RDID0090DeviceDesc%=RDID0090Install, USB\VID_0582&PID_00FE ; VS-700 M1
%RDID0091DeviceDesc%=RDID0091Install, USB\VID_0582&PID_00FF ; VS-700 M2
%RDID0089DeviceDesc2%=RDID0089Install, USB\VID_0582&PID_0100 ; VS-700
%RDID0091DeviceDesc2%=RDID0091Install, USB\VID_0582&PID_0101 ; VS-700 M2
[Roland.NTamd64.6.2];; not supported
;---------------------------------------------------------------;
Be sure to disable driver signing as previously discussed, or this won't work...
I'd try myself, but I don't have the good fortune of owning a VS - 700.
-Mack