Of course, this 20 megabytes does not include more than 30k of actual information. If you started with 30k of information, that is the most you can end up with. This kind of image jiggery-pokery can be very useful, but one must be wary of the introduction of artifacts. Assuming you're using 24 bits, your 30k piece of the original image is only 10k pixels, or 100x100. That's all the information you have to work with.
Any detail showing below that level is an artifact.
Rather than answers I got questions. Sorry I must have missed your original post. But I'd sure like to see one of these pictures if you've posted them anywhere they can be ftp'd. If so, I'd appreciate knowing.