how can we delete modem inside rom zips of the 910c ?!

i am a 910H user and i kind of find it annoying how it always gets into bootloop when flashing a 910C rom since it uses its own modem.
(and its troublesome to flash modem of the 910H all the time and sometimes i still get into bootloops..)

so in which folder can i find the preinstalled Modems that come in the 910C roms ..? :l