Need to control 4 DC brushless motors from a joystick

I have 4x 4DC brushless motors and would like to control all 4 from analog joystic,max two at time while one can be forward and other one to reverse mode. So now I need from you to tell me what I need to buy to be able to control 4 motors.

Our controllers are dual channel so you will need two controllers to control four independent motors, unless motors are coupled in parallel in which case one controller will suffice. You may want to tell us more as far as how the motors are connected.
Our controllers take input from analog joystick. If you give us the model/data sheet of the joystick we will be glad to check it is suitable.

Joystick would be the one we all use on PS2 (playstation board)

The joystick you plan to use is USB digital, not analog. Our controllers interact directly with analog joysticks.
A digital joystick can be used if you connect it to a PC and then you connect the PC to the controller via the RS232 port.
You would have to write the PC resident software, handling the joystick and the required four degrees of freedom.