Not sure what you mean by "software"...
do you mean the firmware in the CAM? Or the firmware in the card? Or the firmware in the receiver itself?
The German Premiere-World channels are encrypted under their own "Betacrypt" variant of Irdeto. This can still be accessed by Irdeto CAMs but you need an "AllCAM" version of firmware loading into the CAM.
Beamer's goldcard s/w is about the most reliable around and it's updated very soon after an encryption change. It won't receive all the PW channels but it'll get the ones you want. You can find it on the links page.
I also have a Nokia 9600s and can confirm that the Beamer s/w is the best. Also get the edit prog - EEPromEdit.exe - and do your own edits in advance of the Beamer file updates. The german http://www.geocities.com/keypage1/ site has all the codes you need and has the fastest updates.
There is an edit possible to the Beamer file to bring in all the Premiere channels except PPV. You can work this out youself from the info on the Keypage site.