The easiest thing to answer is the smileys. First, instead of typing in the "Quick Reply" box at the bottom of the page, use the "Quote Reply" link in the post you are responding to. When you do that, three important things happen:
1. The comment you are responding to is included. This topic is fairly linear, but some get complicated and that can be very helpful.
2. You get the option to include attachments like pictures. If you want people to see the detail of the picture, check the "(store original)" box, and we can download an exact copy of the file you post.
3. On the left are the smileys which you can click on to include them in your post. :-) The most common one is that, and it is simply the three characters : - ).

Now, the SB700. On the camera, it operates in basically the same way as the built-in flash. But to get the best results, you want to take the flash off the camera. You can use the camera's built-in flash as a commander with the SB700 a remote flash. That is more complicated, and you might want to do some reading on it first. Then if you want help, post a new topic on that.