[Mediawiki-l] Change Link in Footer

[Lars Fronius]

Hi,

I am a bit stuck here. I need to change the footer of my wiki. I want to insert a link to an external disclaimer.
I do know about the array in the skins directory which is $footerlinks. I think the 'disclaimer' there links to my language File where a link is built from 'disclaimers' and 'disclaimerspage'. Every time I change a value there to http://example.com/disclaimer.php the link isn't built properly. 
So what do I exactly have to change to get a proper link in my footer? 

Thanks, Lars