DOCBOOK: Printing "Module" instead of "Chapter".

[Jorge Godoy <godoy@conectiva.com.br>]

We have a document which is a booklet. We are using the book type but
we'd like to replace the word "Chapter" with "Module" (and, of course,
it's correspondent in portuguese). Is there a booklet type or an easy
way to change the word "Chapter" for "Module" in the stylesheet? I'd
like to have all the chapter characteristics but change it's name. 

Thanks,
--
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