so the plugin should be an msi
snap-in run with should be c:\windows\system32\msiexec.exe
snap-in run with Argument /i
snap-in file blahblahblah.msi
anp-in arguments /qn
this works for me… I use smart packager discovery for every little thing i want to change pulled from a vm deployed specifically to grab changes i want done.
works great.