Setup switches not working for Sophos Entpoint Security and Control 9.5

Our faculty is switching from Symantec to Sophos. For a start we will do a setup with unmanaged clients. We will configure the clients to use the universitys central updateserver to get updates..

I have downloaded savw_95_sa_sfx.exe from Sophos. I have extracted the file and would like to do a silent install.

According to:

http://www.sophos.com/support/knowledgebase/article/12570.html

It should be possible to do something like:

setup.exe -mng no -crt R -updp http://xx.yy.zz/sophosupdate/cids/s000/savscfxp/ -s

But it is not working. Setup just starts as normal.

Also tried setup.exe -?

Again setup just starting as normal...

Is http://www.sophos.com/support/knowledgebase/article/12570.html not up-to-date? Or should I do a MSI install instead and does anyone have the MSI parameters for that?

Thanks in advance!

Anders