If you want to edit msi package and you don not want to use Unattented installation, than it possible to use a comandline for setup.exe, and create mst file
comandline is seup.exe /CreateTransform "MST file"
i.e. setup.exe /CreateTransform "R:\VSS\Setup.mst"
Creating a transform file is the ONLY way to do a silent installation.
1. setup.exe /CreateTransform "C:\transform.mst" (you must provide full file name and path to MST file to create)
2. Move transform.mst to the install folder, same place as setup.exe
3. to do silent install, use msiexec with vs_setup.msi and your transforms file. Ex: msiexec /I vs_setup.msi /qn TRANSFORMS="transform.mst"
Note that this is also the only way to use vs_setup.msi on its own. If you don't create the transform and use it, it will simply tell you that you must use setup.exe.
Don't waste your time with trying to create an unattend file (.ini) - they're useless.