[Inkscape-user] How can I achieve the same effect as "flood fill"

I've drawn a dartboard type grahpic using circle shapes and straight lines. I need to colour each resulting cell in the dartboard a different colour, somthing that I could use a flood fill or paint bucket type tool in graphic programs like the Gimp or Photoshop.

What is the best way to achieve this in Inkscape? I've put the project up online here: http://blog.mennos.org/nucleus3.2/media/common/rings.svg