Hi madnesstiger, Welcome to the WiiHacks community.
You can you the video tutorial in the following thread to see how to open as well as install solderless chip
You can take a look at the chart at the D2sun site to see the difference between each d2sun chip
D2SUN universal 6 wires modchip for ALL Nintendo WII! With nero dual programmer
You can then go to the following thread for more modding info