I have not had any problems with the ethernet adaptor being installed. If you have not soldered before I would not attempt it. If you know how to solder, soldering 4 wires is easy. I have 2 pictures of the usb port with the adaptor soldered in to place. I would do it like this image:
The usb ethernet adaptor and wire facing the same way. do not do it this way:
That was the first one I did. It still works but there would be more ware and tear on the solder joints when you install the adaptor. Also donot forget to insolate the adaptor and the exposed ground on the end of the usb cable. I use some thick clear water-proof packing tape(thats all I had laying around).
I also over cloced my 3rd WP to 266. I have not installed windows or linux yet to test it. I did let it sit at the WP's web brouser for a few hours with a CPU fan sitting on top of the heat sink. the WP did not lock up. I then cut a crude hole in the case to mount the fan. cloed the WP up and let it run for another 2 hours. The WP stayed cool. I got the power from the WP at the main filter cap (where the power is pluged in to the WP).