When looking at XSI there seem to be a plethora of tutorials around showing how to make a rig for character animation. What I'm wondering is, what is wrong with the biped guide and subsequent rig that comes standard with the package? I played around with it and although you don't have complete and total control of every aspect you do have a LOT of control. Is there any reason why people prefer not to use this method, or do they and the tuts are just for a differnt technique? Are there any tutorials that discuss XSI's rigging setup?