How do I create a package that contains a CMD and RUN command?

Hey Guys!!!

I apologise in advance if this is a stupid question, I'm quite new to this stuff so please go easy on me

I have been given the task of rolling out a software upgrade for a piece of company software.

Basically what needs to happen is (in this order):

1. Install a file from an MSI ( I have been given the MSI file which is in the SMS server package store )

2. Run this script "C:\Windows\System32>MsiExec.exe /x {205CFDD2-34CF-4141-93AA-55FCDB7BB012} /q" (uninstalls the old one)

3. Run this RegKey file "regedit.exe /s \\aumxxxxxxxxx\smspkgg$\xxxxxxxx\settings.reg" (Adds the server settings to the new one - ATTACHED)

Is there anyway to compile all these steps into one package where it can follow these steps?

There are also 2 .mst files in the folder which im unsure of how to open to see what they are.

Let me know if you need any further information.