Celsius, it’s time consuming, but not particularly difficult.
You’ll need a soldering iron, and you’ll have to learn to solder. It’s actually not very hard at all, and you can get an iron for about $8 at Radio Shack.
You’ll have to kill (gut) the 360 pad, unless you want to install connectors on both devices, which is a huge amount of trouble.
Unscrew the original joystick’s PCB. If you have no further use for it, please mail it to me. Pull all of its wires off the buttons; they will remove easily because they use quick disconnects.
Prepping the 360 pad is the most time consuming part. You must:
1- desolder the triggers from the board (without damaging the board!), and then add 2 10K resistors to the triggers’ bottom 2 contact points. Do not remove the analog sticks! (but the part you touch when playing comes right off and that’s fine).
2-Scrape the vias for the Start and Guide buttons on the back of the 360 pad PCB
so that you can solder wires to them. Use an X-acto knife and be very careful!
3-Finally, solder 2 wires per button onto the 360 pad (you’ll need a good diagram to do this), then solder the other ends of the wires to the joystick’s buttons. Luckily, it doesn’t matter which wires per 260 PCB button go to which connector on the actual button. In other words, once you’ve soldered both wires that A needs onto the 360 pad, those 2 wires can connect to either of the stick’s A button’s connectors.
If you don’t add any extra buttons to the joystick, you’ll need to leave out the Back button and use the Guide button there instead. You can easily add holes for new buttons on the side of the unit using a 1 1/8 drill bit (the kind for making holes, costs $5-12). Drill from the outside; make sure the stick is empty of all components while drilling to avoid getting them dirty.
To keep your headset working, I suggest getting a headset jack extension cable and running it out through the hole where the Xbox communicator jack is currently located.
When you’ve got it tested and working, just hot glue the 360 pad in where ya want it. Only glue around the edges of the pad.
That’s a basic overview… Except for the locations that the 360 pad’s wires go, it contains all the info most people would need. Please let me know if you’d like additional info… I’ll draw up a very nice wire map for you if ya send me the old PCB.