If you're able to save it as an uncompressed tiff you should be able to
use ImageMagick to convert it to a jpeg with whatever amount of
compression you want.
This should let you compress just enough to fit it on a CD. :-)
More info at imagemagick.org
Jon Winters http://www.obscurasite.com/jon/
"We will bring them to justice, or we will
bring justice to them. Either way...
justice will be done."
- George W. Bush
Gimp-user mailing list