Aaah, so you've got an Espruino Pico, and the ESP8266, and the shim, and you're looking for more detailed instructions than the ones here? http://www.espruino.com/ESP8266
There is a video there - not sure how helpful it is (haven't watched it).
Soldering the three power pins is a little weird, since they're not castellated pads, but you're basically trying to use them as if they were.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Aaah, so you've got an Espruino Pico, and the ESP8266, and the shim, and you're looking for more detailed instructions than the ones here?
http://www.espruino.com/ESP8266
There is a video there - not sure how helpful it is (haven't watched it).
Soldering the three power pins is a little weird, since they're not castellated pads, but you're basically trying to use them as if they were.