You need to get yourself onto a seminar with the IS guys to get your foot in the door with this stuff or likely as not, you'll be muscling through it.
I second that one. Our dojo had a couple of hours with Mark Murry a while back which was very enlightening. I'm not sure that what we were shown can be adequately conveyed in print or by video. You need someone there to help you feel it.
Also getting to one of Ikeda sensei's seminars would prove useful.