Sorry for the late reply on this, but it sounds like you got it working. At any rate, my SCCM guy gave me this script, which is what he used to push this out to our user community:
@ echo off
if EXIST "c:\program files\Aruba Networks\Virtual Internet Agent\anuacui.exe" (GOTO END) ELSE (GOTO INSTALL)
:INSTALL
XCOPY \\[unc path to msi file] C:\windows\system /Y
cd c:\windows\system
msiexec.exe /i ansetup.msi GATEWAY=OUTSIDE IP OF YOUR VIA CLIENT or DNS NAME AUTHPROFILE=Via-Connection-Profile_0/VIA CONNECTION PROFILE NAME=[ad service account] PASSWORD=******** GETCONFIG=1 /q
:END
EXIT