Stomps are only of the few contributors of his tone. Nandun parin yung gitara niya. Pickups used, strings used, guage of the strings, thickness of the pick, how he picks the strings and the list goes on.
There's a video where John Mayer used gears of EVH to emulate his tone. Pero kahit gamit nya pa yung mga gear ni EVH, naging tunog John Mayer pa rin siya.
Just listen to Franco's songs and while its playing, noodle with some chords and tweak your gear.