Create working .htaccess-file for URL-redirection

General information for the website: Nothing special
Description of requirements/features: Hi!

I have this page: http://www.relicplay.com/sva/om.html

But I want the following URL to lead to that page as well: http://www.politikappen.se/om.html

As it is now, I am being sent to the index.html of politikappen.se
I talked to my webhost, but they said I need to create a .htaccess file in order to acchieve this.

I need someone to make this work for me.
Extra notes: