Lawrence:
Sending your question to Tech Support was a good idea. I think the "crisp" issue will eventually come down to the IMAGEFMT= option -- although depending on whether it's the lines that are fuzzy or the fonts that are fuzzy, it could be a font issue, as well.
I would not have chosen BMP as the image format because I thought the only thing that BMP was good for was to save images from Microsoft Paint. But I see from this article,
http://www.brighthub.com/multimedia/photography/articles/10036.aspx that it seems to still be used for photo quality images -- albeit with a larger file size than some other formats.
cynthia