two ways to do this:
this is your basic wiring diagram with master coil split on tone pot - no killswitch
http://www.guitarelectronics.com/product/WD2HH3T11_01/Guitar-Wiring-Diagram-2-Humbuckers3-Way-Toggle-Switch1-Volume0Tone001.htmlthen you can wire the other push pull as an on/off switch between the hot of the neck pickup and the main pickup switch - basically cutting the signal between pickup and switch.. doesnt matter if its coil split or not - the hot side of the pickup cant get to the pickup switch
that gives you a neck on/off switch that will allow you to do the tom morello thing using the main pickup switch to flick between connected bridge and disconnected neck pickups
but i think i would be tempted to stick something like this on another switch, wired between volume and output jack
http://farm3.static.flickr.com/2368/3534458432_00095856c6.jpgit can be a mini-toggle for on/off, a 3-way toggle for on/off/on (like matt belamy uses) or a push button that only cuts the signal when pressed. all wired a bit differently, but basically do the same thing - i find the push buttons a bit more usable. these would all require drilling a new hole and making sure there is room in the cavity for it - but nothing major
its more versatile because you can set up your ideal tone and flick to nothing. the other version will only allow you to use bridge sounds for your killswitch stuff