If you need to run the Visual C++ Redistributable from the command line and create a log file, use this command line:

cd C:\Autodesk\Softimage_2011_Subscription_Advantage_Pack_English_Japanese_64bit\Support\VCRedist\2005
vcredist_x64.exe /q:a /T:%windir%\temp /c:"VCREDI~2.EXE /q:a
 /c:""msiexec /i vcredist.msi /qn /l*v %temp%\vcredist_x64_2005.log"" "

You can find the command line used by the Softimage Setup in the setup.ini file
(in the C:\Autodesk\Softimage_2011_Subscription_Advantage_Pack_English_Japanese_64bit folder):

[VCREDIST2005X64]
PLATFORM=x64
PRODUCT_NAME=Microsoft Visual C++ 2005 Redistributable (x64)
EXE64_PATH=support\VCRedist\2005\vcredist_x64.exe
EXE_PARAM=/q:a /T:%windir%\temp /c:"VCREDI~2.EXE /q:a /c:""msiexec /i vcredist.msi /qn /l*v %temp%\vcredist_x64_2005.log"" "