FTSEBOY,
There's no difference since DiNapoli uses a regular MACD. He has a specific non-standard setting which he uses in conjunction with a stochastic indicator. I don't have the setting handy but can give it to you if you want. It won't do you much good without reading the book but you can PM me and I'll give it to you anyway.
BTW, Trading With DiNapoli Levels is one of the best books I've read. It's expensive but well worth it for understanding Fibonacci retracements alone. It's well written (for a change!) and goes a ways towards laying down all the Fib trading fundamentals including entries, stops and exits. I've seen it on ebay for as low as $45 US and several other sites have used copies available.
--opm8