I want to combine the functionality of two PlayStation controllers. I
want the digital pot controllers (mini joysticks) from one controller
and the button configuration for the other. I don't want the
controllers physically combined just functionally. I tried cutting the
cords on the both controllers and splicing them together into one
plug. When I tried to use the controller they were completely dead.

I am a pretty sure that the solder joints on the splices were good and
the wires on the two controllers seemed to follow the same color
scheme though one of the controllers had one more wire which I hooked
to the correct pin-out. I used a lead free silver solder with no flux
but the contacts seemed good.

My best guesses as to why it does not work a

1) The PlayStation does not put out enough power for both controllers.

2) The controller put out digital instead of analogue signals and they
are interfering with each-other.

Does anybody know why this attempt failed or have a suggestion as to
how I can get the joysticks on one controller to work with the buttons
on a separate controller. I only have basic equipment and a small
budget but there is a good electronics store and a radioshack in
driving distance.