I'm working on a program for that.
I think it can patch about 50% of Katana Games.
For the moment, it works on :
_ Vampire Chronicles
_ Slave Zero
_ GigaWing
_ Wrestling Fighting Spirit 4
_ Civil War Turb
_ Animastar
_ ...
In fact, it works on games you can find patches for here.
This protection is quite easy.
I'm working on more difficult patches...
I'll send it to DC Copyworld when it'll be finished.