need help with HTTP-WebTest module, tutorials or examples

I need help with the HTTP-WebTest module. Does anyone know of a
tutorial that would help? Examples needed (pictures would be nice too,
as I have my own crayons).

Can't even seem to get output_ref or fn_out working to see the output,
so that I can see how it handles css and document.write while reading.
Haven't even tried to read php or cgi generated pages yet.

Any and all pointers to help files will be appreciated.