I havn't seen this suggestion yet, but have you thought about possibly using a dremel or craft grinder. My dogs (5) hate having their nails trimmed with a guillotine clipper. From what I understand it applies pressure to the quick, that some dogs find really uncomfortable. I prefer the cordless type (craftsmen, $28 at sears) They really do seem to prefer this method. You just touch it to the nail instead of applying a constant pressure (it can heat the nail up) The best thing about it, is that you can see how far you can go down without grinding into the quick..

I learned how to use one from www.doberdawn.com

Be advised that you have to take precautions with longer haired breeds.