Hi catuligbat
You want to add cheat to psx emu right?
Have you try action replay in Wiisx ? It's a lot easier way to use cheat.
Take a look at that page ,
Settings: Dynarec (Can also run with Interpreter, however at a bit of a slower speed, for games that require it), Limit FPS: Auto, Frame Skip: Off, Dithering: Default.
Result: Works perfectly. After selecting cheats for a game, press the start button and select "With Codes." When it asks to insert game disc, go into the WiiSX menu and select the "Swap CD" option. Select the respective game and exit out of the WiiSX menu. Press the X button, and Action Replay will boot the game with the selected cheats enabled.