stupid question...

Sorry if this is a faq or plain stupid, but I simply seem to be unable to get an xemacs-21 beta working... After a long time I want to again work a bit with xemacs, and so I decided to get a new package enabled xemacs-21. I downloadded the cvs xemacs-20 and xemacs-packages. But what now? I first compiled xemacs and installed, then went on tho the packages and also compiled these... but where am I supposed to install them? Do I simply link the whole structure under (prefix)/lib/xemacs/packages? That's the default path for packes if I read the docs right... But do I have to redump XEmacs? How will it know about the packages? Are they simply searched along a path on startup? WHat if there's anything that has to be dumped along with the base? After all, my XEmacs comes up with just a minimal loadpath of blabla/lisp and blabla/term. And of course nothing else is found. DO I need some initialization from lisp? WHAT TO DO and in which order? Any help would be very appreciated. PS: and sorry for any stupid faqs... BUt I'm just getting back on board and feel a bit like being washed away by the big wave just before reaching the cabin... jtl