<snip>
>Then I open the image
>in Graphic Convertor and save it as a JPG there. It
>has an option to save it web ready with no resource
>fork. This reduces the file size hugely without
>reducing the quality for low resolution, email and web
>suited, images. 
>
>Kind regards,
>Kelly
</snip>

If photoshop is indeed being used already, it too has 'Save for the
web' which also does an impressive conversion job, so again not an
explanation but a possibly a solution.

Cheers
Paul