Open Cheat Engine click little PC with a magnifying glass
and select arma3.exe and click open
Change the Value Type to String
in the text box copy and paste ["onLoad",_this,"RscDisplayInventory",'IGUI'] call compile preprocessfilelinenumbers "A3\ui_f\scripts\initDisplay.sqf"
Click First Scan and you should get a result on the left
Double click that result it will add it to the bottom
click the result at the bottom and press enter
in the text box that opens when you press enter paste ["onLoad",_this,"RscDisplayInventory",'IGUI'] execVM "path\to\script.sqf"
Click OK
go ingame and open your inventory