I finally understood how the controls work for MGS2. I'll leave comments inside the ini files, this is still a work in progress.
00 X // X 01 A // Square 02 B // Circle 03 Y // Triangle 04 L1 // L1 05 R1 // R1 06 SEL // Select 07 STA // Start 08 EX3 // L3 09 EX1 // R3 0A L2 // L2 0B R2 // R2 0C U // Movement Sticks & D-Pad Up 0D R // Movement Sticks & D-Pad Right 0E D // Movement Sticks & D-Pad Down 0F L // Movement Sticks & D-Pad Left // Controls Index // Positions // 00 = X // 01 = Square // 02 = Circle // 03 = Triangle // 04 = L1 // 05 = L2 // 06 = Select // 07 = Start // 08 = L3 // 09 = R3 // 0A = L2 // 0B = R2 // Buttons // X = X - Chocke/Throw // Y = Triangle - Action Button // A = Square - Attack/Back // B = Circle - Crouch/Prone/Roll Button // L1 = Left Gadget/Equipment Menu (Hold) // R1 = Right Weapon Menu (Hold) // R2 = First Person View (Hold) // EX1 = First Person View (Toggle) // EX3 = Walk // AL = Coded portrait zoom (Left side) - Set to L3 on the PS2 version // AR = Codec portrait zoom (Right side) - Set to R3 on the PS2 version // SEL = Codec Screen // STA = Pause Menu
Anyway the L2 and R2 buttons simply do not work for some odd reason.