I'd agree. If you have the can then just do the JAA PPL. It will take a bit longer and cost a bit more, but it is the only way to do the CPL.
Also, in my humble opinion, the extra effort to get the JAA PPL is worth it even if you don't want to fly commercially. The extra experience you gain in the 13 or so extra hours is well worth having. And of course you can fly in other EU countries, which you can't with the NPPL.
I have spent many an hour trying to shortcut the route to the CPL, but the conclusion is you can't.
Bri