Forum Moderators: not2easy
So I followed the US link.
The only way I found to do this using firworks4 is a bit of hack - draw a rectangle with rounded corners. Then select the rectangle tool and toggle the texture settings in the stroke menu to grid (1-7)or until you have border you are happy with. You might have to play to get the desired effect. If you resize it you might want to stick to muliples of the grid width as this will resize the dotted lines with cleaner effect.
I have a feeling the MX would probably allow you to do this far less crudely.
Ta