How to specify a an exact (not a minimum) width for the table cell?

I am trying to have a table which has a 3 columns( cells to be exact - just one row and 3 cells in it ): the rightmost one has a textscroller(java appl) with some bg color, the middle one has just a picture of a round corner and the leftmost one has some text. I want only leftmost cell to be resizable. But instead Netscape tends o add axtra space to all three columns. Ironically it would work with Netscape if I wanted the rightmost column to be resizable. I guess I could manage it if I knew the way to specify not just minimal size of the rightmost cells but also their maximal sizes (or just one exact size).
Any help would be appreciated.