I'm obviously too damn stupid. I apologize to the creator of this plug-in.
It really doesn't matter where the reg. keys are (
@ me). The only problem is that the configure box does not appear, and that the nickname doesn't refresh by itself.
Edit: I can refresh it manually with "/xwinampnick". So the plug-in does work.
Edit 2: Now it crashes MSN Messenger when enabled. *sigh* Wish I knew C++...
So, sorry for all the mess I did up there. m(_ _)m <---- bowing (Japanese thing)