Ah, you might have to change:
0x1221D5 from 740F to 9090 - makes enable/disable save point function always enable save points
0x1222AD from 740F to 9090 - makes enable/disable switch menu function always enable the switch menu
0x12BE2E from E2FC to CA03 - screen loading activates save + switch menu instead of disabling them
otherwise it gets reset on screen change and it won't activate unless you touch a savepoint at least once. What exactly was wrong with the numbers?
Also if you want a nice hex editor, I'd suggest:
HxD.
EDIT: added cleaner solution