This is a tutorial to insert a kill switch without having to drill a hole on your guitar .
WARNING! First of all, if your really don't know what you're doing, it means you don't belong to the DIY community.
Be smart, take responsibility of your own actions. This tutorial is just a guide.
Firstly, unscrew one of the screws for the pickup selector switch. I prefer the "neck pickup" side.
I bought a Momentary Normally Open (N.O) Switch with two prongs for RM2 (about USD 0.66). Make sure it is non latching (momentary) and it is normally open (N.O).The diameter of the shaft of the switch is 12mm. You can use whatever kind of switches. But the reason I use this type is,with the casing, it looks like my other knobs (stay focus, guitar knobs) in terms of size and length. Solder a wire at each prongs. Just make sure the length of those wires is long enough.
For the casing, I use the Fluorescent Lamp Starters. The reason was it is the only item i could find in my house the could fit the momentary switch. Open up so that you get the plastic cover. I cut/saw so the length is a little shorter but still can fit the momentary switch (less awkward look). Using the solder, I've a tiny hole so that the original pickup switch selector screw can fit in. Using the same method, make a bigger hole so you can fit in those two wires you have soldered to the momentary switch.
Using the original screw, tighten up the modified lamp starter.
By this step, I think you already got the whole idea. Insert the momentary switch, with the wires routed through the starter's hole and pickup selector switch hole into the cavity.
Open up the output jack. Route the wires nicely through the cavity and solder the wires; One on the sleeve and one on the tip of the jack. Just make sure you solder it nicely. Don't worry about polarity , etc. (it worked for me both ways).
Tighten the output jack. Snug the momentary switch in place and test it. When you push the button it should be a complete silence (no buzz or hum). Then it's working, If there is still a sound or nothing happen then check your solder points or your momentary switch. NOTE: We did not alter the original wiring for the guitar, so if it doesn't work (most unlikely), just undo the soldering point and your guitar should be normal again. Finally, tidy up everything, I use the chrome sticker to cover the lamp starter but missed out the picture. Maybe I'm just too eager to post to Instructables.com ,i guess. :D
NOTE: after toying around with the killswitch for quite some times, it turns out that now I really want a permanent kill switch which means I have to drill the body. :D Anyways, enjoy!