You can run the installer in silent mode from the command line using the following command:
C4DtoA-2.0.0-win-R18.exe /S /D=c:\my\install\folder
/S defines the silent mode, /D defines the install folder. If the folder is not given, then the C4D folder from the registry is used.
Because of a limitation, the installer can not cannot write any messages to the console. Also, the command returns immediately, and the silent install runs in the background, so a special logic is needed on the user side to detect when the install finishes and it was successful or not.