right, use a razor blade (a knife is not sharp enough) and carefully cut around the anus and ever so carefully remove the glands using light pressure and careful cutting.

This dvd is well worth it to show you how it's done.

http://www.fntpost.com/Products/Fur+Handling+Videos/Kyle+Kaatz%27s+Skunks+The+Best+Investment+You%27ll+Ever+Make+DVD