How to open mst files

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Personally I never edit the MSI-file in case I need the original. Orca will allow you to either edit the MSI-file directly or to create a MST-file. When launched you will be presented with the following window:

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From here, run the “orca.msi” and install the product. This is a msi-file, but it will open in 7-zip.Įxtract the content of the MSI-file to a location and browse to \Windows Installer 4.5 SDK\TOOLS. What you need to do is to download the “ Installer 4.5 SDK” from Microsoft.

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Unfortunately getting Orca is a bit tricky and not so obvious as one would think. I use Orca to create my MST-files, but there are other tools out there as well.

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Even though you can do a lot of things with an MST, sometimes it is better to repackage the application. This post will show you the basics of creating and using MST-files and later it will be populated with links to settings I personally use when deploying applications.Ī MST-file is as Windows Installer Setup Transform file, so what it does is apply settings to the installation MSI. When working with MSI-files, MST-files are a big part of getting things to work the way you want it to do when deploying them with SCCM for example.