for the default cwcheatpops.prx that has caetla/ar/gs support
you just need to copy the codes without conversion just by modding the cheat.db with your 
favourite editor.
this is the db format:
_S signature of the game it's like the executable name but without the . example SLES_12345
_G the game name (whathever you want)
_C0 code name
_L line of code eg: 80025474 FFFF
[...]
_L last line of code eg: 80015474 FFFF
_C0 second code name
[...]
then you start again with another game with it's _S signature then _G game name and finally codes (_C0) and
codelines (_L)

IMPORTANT: IF YOU HAVE MASTER CODES ALWAYS PUT THEM AS FIRST CODE AND ENABLE THEM WHEN USING OTHER CHEATS!!!

example:

_S SLUS_00664
_G XENOGEARS
_C0 xenogears: debug mode
_L 8004F34C 0000
_C0 xenogears: max money
_L 8006EF58 967F
_L 8006EF5A 0098
_S SLES_00154
_G MYGAME
_C0 max life
_L 80024574 FFFF
_C0 max h20
_L 80045714 FFFF