Having the tone control for one pickup only is easy. It's done on the switch. It kinda looks like that is how it is setup in the diagram already. On a Strat 5 way, there is a jumper that ties the pickups to the tone control, and you can leave the lead pup out of if it you want it original. I'm more familiar with Strats...but it doesn't look like the lead pup is wired to tone in your diagram, but the way the volume connects to the one tone pot is different on this, so I wouldn't swear by that.