Cool. But mine is cooler, and CAN be used on the Matrix programming port. Plus, can be used on ANY matrix without modifying it.

so could i just solder a pin header to my xbox mobo then plug my matix into it via the programmer port, then solder the d0 to the matrix d0, right?
No, don't do that. The header is not pin-for-pin compatible. You would need to build an adapter like the picture above, or hardwire it like the picture further above.
just heat up the pogo pins with soldering iron on the topside, with pressure applied to the springed pin from the bottom ( becareful dont burn your finger trying to apply the pressure to the pin) when the solder heats up the spring tention will pop that sucker right out of there and leave a nice clean hole, do this to all pogo pins. then install a female header on it and a male header in the motherboard and your done. (except you still have to solder a d0 wire now to the d0 pogo pin hole on the chip and mobo)
ive done this over and over with several solderless chips that the owners got frustrated with it misaligning.
after u solder the female socket to the modchip, and solder the d0 wire to the mobo, do u have to solder another wire to ground it?