YOu just need to create a text , named for example: cheats.txt
and inside you fill thing like that:
then once filled, save it to your device,
load your game, then go to 'select cheat file' menu, then load the txt file , once loaded , you can switch on/off Cheat from 'set or unset cheat code'
Here cheat will be applied only one time, this mean if you return immediatly to set or unset cheats, all will be unset because already applied.
from Applying frequency menu you can choose how many time a second cheats will be applied, it's necessary for many games. but be carrefull to not switch on cheats too early or crash can happen, if a program which has nothing alse to do with cheats is overwritten, so switch on when in game .