Buy a PS2 to PS3/PC convertor to enable your PS2 controller as a Xbox 360 controller:
1) Connect the convertor with your computer/notebook, MotioninJoy will identify it as PS3 wired controller
2) Installation of MotioninJoy please refer to http://www.motioninjoy.com/wiki/en/install/latest
3) Select "Xbox 360 Controller Emulator" mode( refer to attachment "Emulate & Enable.jpg")
4) Ensure emulation is succeed( refer to attachment "Test.jpg")
5) Enjoy PS3/PC game with PS2 controller
Make sure with the seller that the convertor can convert the PS2 controller to PS3 mode before you buy.The one has 2 plugs actually doesn't work. Recommend http://www.gameaccy.com/ps2-to-ps3-pc-c ... -convertor
, good and cheap.