You must have:
Flux - used for a better contact and to avoid dry joints
De-solder Braid - used for cleaning solder from the board incase of mistakes
Soldering Iron - see picture
Solder
Screw Drivers - torx 10 & 20 to open the box
Wire - A fine single guage wire, Kynar is recommended.
A steady hand and good light
Step by Step
(1) put some solder at the LPC port points at the Xbox mainboard.
(2) Place the X-ecuter on it, so that the holes match the points of the port.
(3) Put some solder on your soldering iron. Stick your soldering iron in a vertical angle into the holes - press and at the same time press the X-ecuter firmly onto the Xbox motherboard to ensure there is as little space as possible between the X-ecuter and the Xbox motherboard.
(4) Pull the soldering iron back, keep pressure on the mod chip for a few seconds.
Trouble Shooting
On/Off green red flashing light means you have one of the solder points through the holes not making a contact with the solder points on the board.
Diagrams:
