First off, Welcome to Acidmods.
For the swap its straight forward. Solder the cathode to negative and anode to the positive points on the powerboard.
And here's a video demonstration by 4dp
http://www.youtube.com/watch?v=eavpgPWvD70Memstick and wifi is done essentially the same way. You can use search at the top for finding the pinout.
And for your second question, yes, you can.
People have asked these questions and gotten answers, so try to use the search function if you have question.