When you open and edit an image or an image slice that is part of a Fireworks table, Dreamweaver starts Fireworks, which opens the PNG file from which the image or table was exported.
When the image is part of a Fireworks table, you can open the entire Fireworks table for edits, as long as the <!--fw table--> comment exists in the HTML code. If the source PNG file was exported from Fireworks to a Dreamweaver site using the Dreamweaver Style HTML And Images setting, the Fireworks table comment is automatically inserted in the HTML code.