For a silent install of DartFish 5.5 this was my command line using SCCM 2012:
dartfish\Dartfish_Software_5_5.exe /S /qn
For a silent uninstall, this was my command line :
msiexec.exe /X {2EF71CAC-93B0-4A62-ABB8-0FB61548CCDA} /qn
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