This comes from the 'cached' link of a google search with "Flexwiki QuickSetup". Google says this was cached on 27th March 2009.
PS: This is one more place with some references: Flexwiki at Winart.com.br.
what follows is a cut-and-paste from the google cached page. Sorry for the formatting mess.
What you need first
* Windows Server 2003 (or XP)
o Running IIS
* The web-full-Release.zip from the sourceforge download page
Steps.
Deployment
* If this server is for the FlexWiki, do the following:
o Unzip the files into the webroot folder (c:\Inetpub\wwwroot by default)
* If you run more web applications (more wikis maybe)
o Unzip the files into a chosen folder
o In IIS manager, share this folder as a virtual directory ( more info )
later on we will refer to the shared folder as fwfolder.
Giving rights
* If you want Anonymous read/write
o Make sure the IUSR_{computername} user can read fwfolder and can write the subfolders of fwfolder\WikiBases
* Advanced
o Take a look at fwfolder\Web.config file security settings section (about line 105-147)
Now, you are ready to use your flexwiki with a default namespace, try it! (Always use the same domainname in the url, or the cache will mess up links. Eg. don't use http://localhost/flexwiki , just http://myserver.com/flexwiki ).
Configuring a namespace
* Open the fwfolder\WikiBases\NamespaceMap.xml and edit the "DefaultNamespace" and the provider parameters
* rename the fwfolder\WikiBases subfolders respectively
* edit the _ContentBaseDefinition through the wiki engine, or at file level