If I recall correctly, Borge, it involves stripping the tape off the pickup sides, nipping wires, and a bunch of other jazz. Nevertheless, might be interesting to find for the OP.
So why can't you sweep pick with the bridge pickup? Roll off the highs a bit and you're all set. Well, so long as you're watching Michael Romeo videos, he uses a Tone Zone pickup in the neck position now. Listen to his solo sound recently, especially on Paradise Lost (album) and you'll get a sense of what his deal is. I thinks it's loverly
RE: JP middle pos. The coils in series will give you a Gibson 3-way sound. Parallel will give you a Strat-quack sound. Since the JP sig guitar has a 3-way switch, I'm willing to put money on it being a series-wired middle position, in which case you wouldn't need a fancy megaswitch.
On the topic of megaswitches, they give you different tonal options. E-Switch automatically does coil tapping for you, P-Switch is a PRS position copy. The switch where you can put in any wiring combo is the Superswitch, which is a total beast and requires an advanced engineering degree to even purchase.
In all honesty, I have the P-Switch in my V, and I can't hear a huge difference in pos'ns 2 and 4. One is a bit more trebly, one a bit more bassy, but that's about it. Nothing to pull an Eric Johnson over.