Easier way to remap mouse axis / keyboard input to iphone joysticks?

Is there an easier way to setup iphone joysticks on an existing mouse input project? Meaning, a psuedo method either by using Playmaker or a simple script.

So instead of changing the input mouse script to iphone joysticks, instead, you would be able to use both the mouse AND joysticks, Simply by assigning the mouse X and mouse Y axis to one joystick. Then on the other you can assign the move keys, W A S D to the up left rite down of the joystick.

This would be so much easier than re scripting the input for every project. So you can also test on pc and iphone at the same time with the mouse/keyboard AND joysticks.

Would anyone be able to point me in the right direction of how to accomplish this? Through either script or playmaker? I would very much appreciate it because it seems a lot more easier this way!