Is there a way to do this? I'm passing a query string for 
the directory and the page name and I want to use the 
default filename if the pagequery doesn't exists.

%h%p%[dirquery:/:::]/%[pagequey:::%n:%n].%t

So, it will not rename images but will rename all the 
files. It works for the file naming when the query string 
exists but it just put a ".html" where there's none (and 
for pictures, JS and PDF).