Yes, Nance has good info on using/adjusting the shadow cameras. You might also check the mini-tut(s) on my homepage for additional info on shadows (my info deals more with directional lights, where the shadow cameras seem to work differently... but you can use that info in conjunction with the other info - it's not exclusionary).

Cinema4D Plugins (Home of Riptide, Riptide Pro, Undertow, Morph Mill, KyamaSlide and I/Ogre plugins) Poser products Freelance Modelling, Poser Rigging, UV-mapping work for hire.