SelectItem GRID + PICKLIST?

How can I get the Select Multiple (Grid) example to use checkboxes for selecting/deselecting records and show all records at the same time?
See screenshot for an example of what I am looking for.

Multi-Select example:
http://www.smartclient.com/smartgwt/...bobox_category

Thanks!

Attached Images

GRID_PICKLIST.png (12.8 KB)