well… you might be able to do it with dreamweaver without learning the html method for table creation. In dreamweaver you simply do as lostinbeta says. “Insert/table” 3 cells by 3 cells.
The image gets cut into 9 pieces and saved as separate files (I suggest a highly optimized jpg to conserve file space).
When you’ve got it ready, you select a cell and in the properties panel choose an image as “background” for the cell.
do a test to see if they all meet up correctly at the edges.