Drag and drop from multiselect to multiselect?

[justincredible]

I'm starting on a new project at work and am trying to gather as many resources as I can. What I need to be able to do is drag items from a multiselect list on the left to a multiselect list on the right. Is this possible? I haven't been able to find any js code for this specific problem. I have found standard drag and drop source and drag and drop between trees but nothing dealing with a multiselect. I am not very experienced in javascript so I'm not 100% sure what I should use as my guide so any help/advice/links would be appreciated. Thanks!

Also, any alternative suggestions would be welcome. This is how the boss wants me to do it but he is easy to persuade. For this particular application I believe this would be the best way to do it but then again I've only been out of school for 6 months so I'm still a little wet behind the ears.

[justincredible]

After spending the last hour doing a little bit of searching it looks as if it's not possible to do this. Is that correct? I have found examples for dragging one item at a time from one list to another, but not 2 or more items.