First off, you can post pictures here up to 100k. Your pics are only about 30k, don't reduce them so much. I resize to about 800x600 and it works about to be about 100k or so from the my camera starting resolution.
Use a white background for your pictures. Before snapping, use your camera's white balance calibration to set it properly. Just point at the white background (copy paper works great) and calibrate. Use optial zoom to fill the camera frame, do NOT use any digital zoom, just optical. I highly recommend a full spectrum light. I bought a REALLY nice one from Lowes for $20. Lighting is extremely important with a digital camera.
Once you have the pictures, use image editing software to resize, keep resizing until the images are about 100k. With some experience, you'll know the exact size you need to use to get around 100k.
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