Hi, Ian,
if the provider of the service doesn't allow you to upload SWF, then I am afraid it won't be possible.
You could check whether you are able/allowed to associate the JPG/GIF with a URL, which - upon being clicked - opens your SWF which resides on another server.
Best
Matthias
Matthias Günther
Senior Product Manager
Quark Software Inc.(Please note: As I am traveling frequently, answering your post might sometimes take longer)
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