Weka LibSVM wrapper

I saw a LIBSVM class contained in the weka knime node source, as well as the selectable libsvm in the weka meta classifiers (e.g. CVParameterSelection), however on execute the libsvm.jar cannot be found in the Classpath. How would I be able to add the jar to the classpath on plugin level or even better couldnt you directly export the weka pluging with the libsvm.jar as incorporated library?

Why use the weka wrapper at all and not the LibSVM tools directly? Since i want to use the meta classifiers!

Cheers and thanks for your answer,