Basically I've requested this in multiple places including the PCSX2 forums but it seemed as though cheating in games was out of the scope of many people over on those forums, they were inclined to help with smaller tasks.
To put it simply I need to somehow get Bosch who is one of the characters within this title into my party, he betrays the main character and is only playable earlier in the game, there is also a weapon he has called "The Beast Blade" I've managed to play with values and add the weapon to the MC's weapon slot and use it but it seems to cause conflict with charactr data. One of the other characters "Nina" when using the Beast Blade around her, the emulator locks up and crashes because it causes graphical artificats for her character model.
I've also been able to add Bosch into my party in several parts of the game but haven't been able to use him in battle nor access the menu's or equip screen or else the game also hangs and crashes.
Maybe this is too specific, but I was trying to be as detailed as possible with my request and maybe people can't help me here at all but I thought I may as well try.
Here are my codes that I put into a patch file. these are all in unencrypted(RAW) format
2076536c 00000025 (Beast Blade) Ryu
20769922 00000003 (Bosch in 3rd party slot)
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem