Uncompressing image created with IFD

Hi, Mac is probably the one who would know about this since he told me about this product to begin with.
Anyway my question is this:

When you create an image with Image For Dos (Terrabyte) it seems to automatically compress it.
Because the size of the original image is about 35% larger than the created image.

How can I create an uncompressed image?


Thank you very much for your help!