It's pretty limited. It's only a 2 MP camera, and more importantly, the optics are kinda crappy. You can open the camera, hit the Menu key, and go to Options. There you can adjust the pic quality (Normal, Fine, Superfine) and picture size (Large, Medium, Small). Maybe a smaller pic would be less grainy. I don't know enough about white balance or photography in general to advise anyone on other settings.
All picture sizes have the same basic ppi ratio. The bigger the pic the more acutal pixles. Are in the picture. Put the settings on super fine and the largest size pic available. Then if you want to resize it smaller it will have betetr picture quality. Sorry that the wording of this reply was so crappy.
pretty much you need a steady hand and brighter light on the object for a nicer picture.
Oh yeah also make sure your heart beat stops so that the BB doesnt move also