The only difference is that this time, you're going to set the frame number to 2. Because each frame is an individual web page (or a simulacrum of one, at least), each button needs to point to a different page, where you will built the corresponding content.
At this point you should go through each button and repeat these steps so that each one points to a different frame number. I have four buttons: my Home button pointing to frame 1, my Portfolio button pointing to frame 2, my Video button pointing to frame 3, and my Resume button pointing to frame 4.
