2 players in emulator

I've got two Generic DualShock 2 controls and are not recognized by the emulator as dualshock, so I need to use one of them as a keyboard and emulate the keyboard by the JoyToKey application. But would you have some way to simulate player 2 control too, or is there any other way to use 2 controls on the emulator? Because I could not see this option ...

So I do not know if this emulator has already been implemented support for 2 players or not

Thanks