How can I have a second Uploader on my page (see example below)

 

In my example what I need and done was to separate the Uploader for each Thumbnail and Large Picture. I've rename the uploader tags to uploader1 for the thumbnail and uploader2 for the large picture but only the large upload button is activated.

 

Is there a way to be able to do this on the same page?

 

Thank you