From the Readme:
This hack consists of two parts.
The first part makes weapons with 255 (0xFF) crit unable to crit. They will display – on the Equipment tab of the Inventory page and while using the R-button examine.
The second part modifies items with the Negate Criticals ability (0x80 in Weapon Ability 2) so that anything that is not an item with that effect only activates if equipped. For example, if you give an iron axe this ability, and Garcia has it in his inventory but is wielding a hand axe, the crit negation will not take effect. Likewise, if you trade that axe to someone who cannot wield axes, nothing will happen.
NOTE: Stone (item 0xB5) used to be hardcoded to show 0 crit, but I hijacked that space to branch to my new routine. Unless you set its crit to 255, it will have a displayed crit (which will do a grand total of absolutely nothing, although I suppose it’d be amusing to see).
The Silver Card and Member Card, as far as I can remember, work via item ID. If you have something specific in mind, I might be able to rustle something up.
In regards to the Fili Shield, I’m working on a rework for that, to be released in the next couple of days.
Done this, will post tomorrow. Too tired atm.