code: public int getImageSize() {
  		int filePages = (int) header.get(FILE_PAGES);
  		int lastPageSize = (int) header.get(LAST_PAGE_SIZE);
  
  		int imageSize = (filePages - 1) * PAGE_SIZE + lastPageSize;
  		if (lastPageSize == 0) {
  			imageSize += PAGE_SIZE;
  		}
  		return imageSize;
  	}
docs: Calculates the size of the image based on {@link MSDOSHeader} information
  FIXME too large, surpasses PE signature
  @return image size