Need to create an easy tool for non-tech users to install security tool

I need advice on "packaging" some tools for a non-techy end user. I want to have office staff who are using VNC to connect from home to their office workstations to install stunnel for Windows. Basically, I'd like to create a flash drive or CD that the user can insert, and click on something (.bat file ... whatever) to install the components.

I've done this by hand and there are some tricky steps:

1. Download stunnel from https://www.stunnel.org/downloads/stunnel-5.44-win32-installer.exe, and run it.

2. Copy certificate.pem from installation media to \Program Files (x86)\stunnel\config

3. Copy stunnel.conf from installation media to \Program  Files (x86)\stunnel\config. This one was tricky because there will already be an stunnel.conf in that config folder and a normal user does not have permission to overwrite it. I had to modify the security properties on the config folder to explicitly permit the normal user to have permission. A non-tech user isn't going to be able to do this.

4. run  \Program  Files (x86)\stunnel\bin\stunnel -i to install stunnel as a service.

Please advise on the simplest (for the user) way of accomplishing this. Thanks.