Hi there,
I'm a Kenpo practitioner who only recently (since October last year) started brushing up on my combative knifecraft by drawing upon material from other sources (if you've seen Kenpo Knifecraft, you'll understand why...).
Bought a whole slew of training DVDs, including:
1) Kelly McCaan's Kem-ba-tiv Knife;
2) James Keating's Drawpoint 1-3;
3) Michael Janich's MBC and CBC;
3) Shivworks Reverse Edge Methods 1-2; and
4) The Essential Ray Floro, which teaches his FFS method.
I've found helpful bits in all of the above (bearing in mind that the Shivworks DVDs have not yet arrived on my doorstep), but I like Keating's Drawpoint-1 and Floro's FFS best of all. Both teach Reverse Grip Edge In (RGEI) fighting, based on the Filipino Pakal methodology, which is an extremely practical and brutal point-driven style utilising sewing-machine-like stabs, hacks, and shears. Imho, the FFS material is the more realistic of the two, teaching a pretty complete syllabus that encompasses offensive and defensive knifecraft, footwork, practical empty-hand defenses, and the finer points of dueling if required.
Lastly, from what I understand, the Shivworks REM material (another RGEI method) is also reputed to be first-rate in terms of applicability to street survival where edged weapons are concerned.
Hope this helps.
TCG
PS If you buy Floro's material, take the electronic download option; it's way cheaper and once approval is given (in just a few hours), you can immediately save and access the material.