 you 
really <EM>need</EM> to make your documents Viewer Library-compatible?  Consider 
the "Tones" files created and edited by means of the Composer application.  
These are documents, but it seems unlikely that the user would want 
to view or edit these files from other applications--users probably 
don't want to send their Tones via Fax.  Instead of creating 
a VILFile library to work with these documents, the programmers wrote
a specialized application to work with the documents; this task was 
more str