Review Manager 5 (RevMan) is the software used for preparing and maintaining Cochrane Reviews. For further info see here http://www.cc-ims.net/
The installer is install4j so you can use -q as the unattended switch. The switch -overwrite is for updating and checks if the files that already exist are the same or older, if they are the same then it skips the install.
<package id="reviewmanager" name="Review Manager 5.0.21" revision="5.0.21" priority="0" reboot="false"> <check type="uninstall" condition="exists" path="Review Manager 5.0.21" /> <install cmd='%SOFTWARE%\reviewmanager\RevMan_5_windows.exe -q -overwrite ' /> <remove cmd='"%PROGRAMFILES%\Review Manager 5\uninstall.exe" -q ' /> </package>