What doesn't work for HFS editing
We should start a list of what doesn't work so people don't go editing and testing
QuestExp
MonsterExp
Those two i've found it doesn't matter if you change it wont work
I've tried lowering exp needed to level and adding random items to vendors, atleast in my efforts they didnt work
The EXP table is simply a reference for the developers, and the shop list is so incomplete because it also was for development testing, since then the shop list has been re-located to a server side database. When you open the shop the game sends an encrypted packet requesting the item list, or at least what I think would be the item list. (No luck on getting the packet encryption yet)