Working on a PAL patcher

[Megalex]

I'm working on a program to patch games that don't work on PAL DC.

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 NEED HELP FOR MORE DIFFICULT PATCHES !!!!!!!!!!!!!!!

I think my head will explode. Could someone give me tricks on how the guys who made the patches for these games did :
_ Pop 'N Music
_ Mortal Kombat Gold
_ Centipede
_ Street Fighter Alpha 3

And there's no patch for these games :
_ Super Boom Troopers
_ Reversi
_ Golf Shiyouyo
_ Gundam
_ Photo Hunter
_ Jet Coaster Dream 2
_ Card Raptor
_ ...

HEEEEEELLLLLLLLLLLLLLPPPPPPPPPPP !!!