[Mediawiki-l] Mathematica filetype in MediaWiki

[Šerých Jakub]

Hi all,
I need to enable Mathematica
(http://www.wolfram.com/products/mathematica/index.html) notebook filetype
(extension nb) on my MediaWiki (ver 1.7.1). I have tried to add the filetype
to the LocalSettings:

$wgFileExtensions = array( 'png', 'gif', 'jpg', 'jpeg', 'svg', 'nb' ) but it
doesn't work. 

When I try to upload some nb file, it only says, that the file is maybe
corrupted.

The other thing which I would also appreciate is small Mathematica icon (I
have the icon image) near the link to nb files simillar for example to the
icons which displays near pdf links on Wikipedia. Does anybody know, how to
manage it and if it is possible in MW version 1.7.1?

Thanks in advance for any help

Jakub