Rex,
In english units those values are 10,000ths of an inch. IIRC in metric they are 1000ths of a centimeter. The easiest way to determine this is to drop an object on the report, size it to some specific size like 1 inch or 1 cm and then look at the value in the FRX.
>My question is: How do I set the height and width sizes based on the image properties which are in pixels? What is the correlation between pixels and the measures used in the frx? Should I consider whether the image boundaries would leave a space at the right or top of the image?