Quicktime 7.7.9 has removed by default the Quicktime Brower plugin, depending on requirements you can do the following :

msiexec /qn / iQuicktime.msi ADDLOCAL="QuickTimeWebPlugIn,QuickTimeEssentials,QuickTimePlayer".<any additional switches>... for a targeted installed of typical install plus the Web Plugin, or

msiexec /qn /i Quicktime.msi INSTALLLEVEL=4 .<any additional switches>... this however will install everything.

This should be adaptable for the common packaging tools being used.