The PCSX ReARMed readme says that this emulator supports both PCSX.cht files and CwCheat cheatpops.db file. I was unable to figure out the first format, there is very little documentation out there to find, but I was more successful with cheatpops.db file. Cwcheat is one of the more recognized cheat programs for modified/CFW Sony PSPs and cheatpops database is used to cheat on PSX/PS1 games on the CFW PSP. The same cheatpops.db file fortunately can be used just as well on our version of PCSX ReARMed for the OpenPandora.
Once you can find an updated cheatpops.db in the wild, simply drag/copy it into PCSX ReARMed`s appdata folder. Start the emulator, load a game, then on your Pandora press SPACE to bring up the Menu screen, if the matching game cheat codes are in the cheatpops.db you should then now see a CHEATS option ( between Controls and Extra Stuff ), press B action button ( it mimics the Sony "O" button ). Now you will see another screen with a list of available cheats for current loaded PSX game. Scroll UP/Down through the codes, press B button (Sony "O") to switch each code ON/OFF, when you have made your choice/s press X button two times to return to your loaded game. If you did this right and the codes match your PSX game region ( ex NA game=NA code, EU game=EU game code, JP game=JP game code etc) then you can cheat and enjoy your game to your hearts content!
If your code doesn`t work, make sure it is the right code for the right region game. Edit the cheatpops.db carefully and enter the right code/s yourself in the same format as it exists. Use Wordpad or your favorite text editor to see what I mean.
If you have the cheatpops.db and there is no codes for your intended game, then find the codes on the net, and edit the cheatpops.db to add them in. Make sure that the game region matches the code region otherwise it won`t work.
Hope that this helps others out there enjoy this fun emulator on their OpenPandora!
Enjoy your games!!!
.... Patnik.