One thing to note is that the installer (as with most installers) will need administrator rights to be able to run it. Other than that, it should just be a case of following the guide I linked to.
I made a video for you in case you are having problems following the text. It shows the first few steps.
If you run into problems, please let me know which step you are on when they happen, and any details (e.g. error messages) that may indicate what's gone wrong.
Please try running setup -s from a command prompt, like in my video, to confirm that it works.
(Of course, you should not see it do much, since it is a silent install and the point of a silent install is that it happens without showing any progress window or similar. Check that the files appear under C:\Program Files\GPSoftware to see if the install happened.)
Assuming that works, the rest of the task is for you to configure your SCCM tool. You might need to set the "installation start in" folder, but we can only guess how your SCCM tool works, since we are not familiar with that tool and can only help with the Opus side of things.