Nice guitar. GSA ano yan?
I think you can split the coil.. as long as may four-conductor wiring ito. You have to unswcrew the humbucker, ang tignan kung may extrang wire na lumalabas sa pickup.
Then either magpapa-install ka ng mini toggle switch or papalitan yung tone pot mo ng isang push-pull pot.
If you don't have experience sa soldering.. it would be a good idea to bring that to a luthier.
(Someone help me out here. Di ako masyadong marunong nito!
)