Additional tag for the image description

Currently image filter only pulls out the node title and uses it as the alt= text.

My first wish is to use the node title also as the image title (easy enough)
My second wish is to put the image into a div and add a tag like [desc=0|1] to image filter. This tag pulls out the image description and adds it to the image div.

The result of [image:nn size=portrait class=alignleft desc=1] could be something like

<div>
<a href="xxx"><img src="peterpaul.png" width="320" height="240" alt="Peter & Paul" title="Peter & Paul" class="alignleft" /></a><br />
This is a picture of Peter & Paul taken at the sea.
</div>