Syphon Filter DM PSP Controls

What control scheme do you guys use for online play on Syphon Filter Dark Mirror for PSP? I am an above average Battlefield 2 player, so my shooter skills are good, but can't seem to find a control scheme that I can use effectively on this game. I get destroyed online and I wonder how the heck everyone else is so freaking accurate? I'm using the "Advanced Shooter" scheme now, which improved my accuracy a lot, but I still don't last very long. Anyone else play this online?