Nice!I like to do it like this:
>
The > at the start of the line centers the picture and adds horizontal lines above and below it. It looks cleaner that way. I don't usually caption my pics, but if that is desired you would put the text [between the brackets] and it shows up centered under the picture in italics.
>
>text below picture
The text between the brackets doesn't show up. It is the "alt" text which should be only visible if the picture can't be loaded.