Is there a field in the database or a report parameter that will determine which image will be used? If so, try this:
1. Put an Image object on the report. Select an image file as the default.
2. Right-click on the Image and select "Format Graphic".
3. Go to the Picture tab. There should be a box toward the bottom that says "Graphic Location." Click on the button.
4. In the formula editor that comes up, put your logic for how to determine which image to use. Remember that the result has to be the full path and file name for the image.
5. Click on OK and run your report.
-Dell