Having characters learn spells through events

No, the code here alters the RAM that holds each character's learned magic list. There is no such list for Magitek. That would require a major overhaul of the Magitek code, as well as unused RAM for the list of learned "Magitek" attacks, unless you use an existing element that naturally progresses through the game to determine when each ability becomes available, such as character level. Either way, ASM hacking required.