redirect example.xx to www.example.xx

So all you need to do is redirect anything that comes in without www to the www prepended version?

That's straight-forward:

 
 when HTTP_REQUEST { 
   if { !([HTTP::host] starts_with "www.") } { 
     HTTP::redirect "http://www.[HTTP::host][HTTP::uri]" 
   } 
 } 
 

This will take any request coming in to a domain that does not begin with www., and redirect it to the exact same place, but with www. at the beginning of the host name. Of course, this would apply to all domains. If you wanted to limit it to just the domains you listed you could add in a switch statement or a class search, something like that.

Is this what you were looking for?

Colin