Hi David,
You should consider using the UrlGetParameters extension:
http://www.mediawiki.org/wiki/Extension:UrlGetParameters
This way, you can have a single wiki page serving as the "wizard" - it
can keep linking to itself, changing the query string every time (the
#fullurl function might be useful there), and then use #if from
ParserFunctions, and #urlget from UrlGetParameters, to set the right
display based on the query string.
-Yaron
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