Hi, Ron.
I thought that it should be easy, but I was not sure. Thank you very much for the advice.
It seems that there are some redirects from the www to the non-www in the Apache config on my server. I need to contact the Linux admin to get rid of them, before I could proceed with your instructions. Otherwise I would get into cyclic redirect.
Then I'll do everything myself. Thanks for the help.
Best regards,
Promarket