Thanks for the hints. I haven't heard of either solution before and think that the Moodle Exchange course is perfect for this kind of code sharing.
Cheers,
Frank
BTW Isn't 2MB a bit much for the upload size to Moodle Docs? And shouldn't at least SVG (http://en.wikipedia.org/wiki/Scalable_Vector_Graphics) be part of the list? (But these might be purely academic issues...)
Moodle community sites
Moodle documentation: Permitted file types for file upload
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