This is pretty straightforward to do using the v:img tag
<v:img path="imagepath" image_size="thumbnail" width="maxwidth" height="maxheight" />
However, I would like to do the same thing using the shortcut because I am doing to tricky javascript image loading. Would this ever work:
<v=imagepath,thumbnail,maxwidth,maxheight>
It looks like you're new here. If you want to get involved, click one of these buttons!