Silent install of EIVA NaviSuite is possible. 

In addition to the normal installer, NaviSuite can be installed silently by invoking the installer with /S. In silent mode the installation directory can be specified using /D. 
Examples below:
CommandsAction preformed
NaviCat_4.8.exe /S /?
Display installer options in a message box and exit. No installation is performed
NaviCat_4.8.exe /S /D=C:\EIVA\NaviCat
Install NaviCat silently in the folder C:\EIVA\NaviCat
NaviCat_4.8.exe /S    
Install NaviCat silently in the system default folder C:\Program Files\NaviCat
/S:
Silent installation
/?:
Show help dialog with install options and quit installation subsequently
/D=<Installation directory>
Used by silent installation e.g. /D=c:\My EIVA programs\NaviEdit. If not specified, the default installation directory c:\EIVA\NaviEdit is utilized
/NSM
Skip construction of start menu and shortcuts during silent install
/NOWIBU
Skip installation of the WIBUKey License System during silent install
/NOSQL
Bypass the SQL installation and associated ODBC configuration and skip the installation of local demo databases. (This is valid only for NaviEdit silent installation)