Our box of Ocean

[fkshiu]

I'm not very familar with Kodaks, but you should be able to access it if you switch the camera out of automatic to one of the manual modes. If white balance is available, you should see something like a "WB" icon on the menu somewhere - that's how Canon labels it. To custom set WB (again at least with Canons) you enter the proper setting mode and take a picture of a white card underneath your aquarium lights.

As far as editing software is concerned I just use iPhoto on my Mac, but any pretty much any software out there (including what probably came pre-loaded on your computer) will allow you to make the standard adjustments for colour, exposure etc. Photoshop is, of course, the industry standard but most people won't need to use one tenth of its capabilities.