> I was wondering if Filters are case sensitive?
No, they are case insensitive.

> I do not want to mirror the
> executed pages.  I just want to download the raw data 
files.
>  Can this be done with httrack?
Nope - httrack can only download resulting pages, as it 
uses HTTP.

To backup dynamic website sources, use a specialized ftp 
client (such as Unix's lftp)