> Is it possible to download files
> www.someweb/file1, www.someweb/file2, ... , 
> www.someweb/file1000 without ever going to 
www.someweb?
Yes, if you can catch a staring page that will list 
all file* files. (for example, the www.someweb/ index)

You can, for example, start from www.someweb/ and 
catch all www.someweb/fileXXX without downloading the 
rest of www.someweb/, if this is what you want to do.

You can then use filters like in:

-*
+www.someweb/file*

(starting from www.someweb/)

But you can not download all files in a directory 
without having a link that will list these links