Hi,
just to let you know that I have exactly the same problem and googling has not been able to find the answer - yet.
You may find that you have some success with RealPlayer when using the mozilla browser instead of konqueror, I know I do. I have the same setup (Mandy 10.1, RealPlayer 10) and have found that when trying to view .ram files I get Kaffine loading up (KDE's own media player) rather than RealPlayer when I use Konquerer. When using Mozilla it loads up RealPlayer.
I've tried changing the file associations on Konqueror but that as not stopped Kaffine from loading up. I've also tried to configure Kaffine under the codecs section, by pointing it to the RealPlayer codecs directory (where you will find cook.so.6.0) - but I still get the same message.
If I find out what is wrong I'll let you know. Likewise someone please let me know!
