It all depends rather on what sort of scene you are shooting. If, for instance, you are shooting a rainforest scene with many dappled spots of light, the best approach may be to utilise the HDR function of Photoshop CS2 to merge multiple exposures of the same scene. Here is a snip from the HDR help:
Keep the following tips in mind when you take photos to be combined with the Merge To HDR command:
Secure the camera to a tripod.
Take enough photos to cover the full dynamic range of the scene. You can try taking at least five to seven photos, but you might need to take more exposures depending on the dynamic range of the scene. The minimum number of photos should be three.
Vary the shutter speed to create different exposures. Changing the aperture changes the depth of field in each exposure and can produce lower-quality results. Changing the ISO or aperture may also cause noise or vignetting in the image.
In general, don’t use your camera’s auto-bracket feature, because the exposure changes are usually too small.
The exposure differences between the photos should be one or two EV (exposure value) steps apart (equivalent to about one or two f‑stops apart).
Don’t vary the lighting; for instance, don’t use a flash in one exposure but not the next.
Make sure that nothing is moving in the scene. Exposure Merge works only with differently exposed images of the identical scene.
If you don't have a hand held exposure meter, you could spot meter the areas needed by changing the exposure
mode in camera and point out each area, i.e. shadows, midtones & highlights and the set the camera to manual exposure for each of the shots once the composition is set.
If you are shooting close-up, you could use a thin white diffusing material Plastic/bedsheet, etc. to spread the light over the subject.
Col