Missing WMP plug-in for Firefox 2.0.0.3

[G-CPTN]

I'm running Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3 on my new laptop.
When I try to run videos from CNN (http://www.cnn.com/) I get a message
"PLUGIN WARNING
The CNN.com video experience is optimized for Windows Media Player 9 or above.
No Windows Media Player detected.
GET THE PLAYER"
Yet I do have WMP 11!

I've searched the on-line Firefox Help and found the advice to move npdsplay.dll, npdrmv2.dll and npwmsdrm.dll to:- CProgram Files\Mozilla Firefox\plugins , but I can't find npdsplay.dll (even with a search of my HD).
WMP does open when I click on the desktop icon, and also works (on CNN) within IE 7.0.6000.16386, but fails to work within Firefox.

So what to do please?

Oh! and of course I'm running Windows Vista . . .

[Cypherus]

You can pick up those files from this address: http://www.dlldump.com/

Just type in the name too the search or browse through the listings, clcik it and it's on your desktop.

Regards.