Any way to run UML kernel under FC4?

Hi. Never thought I'll need that, but ... Is there any way to run UML kernels on an unmodified fedora system (with standard kernel rpms)? Or, if it isn't which patch/config option/whatever prevents from doing this? (I could do some search myself but maybe someone know what's the culprit). Thanks in advance. -- Paul P 'Stingray' Komkoff Jr // http://stingr.net/key <- my pgp key This message represents the official view of the voices in my head