AddWeb requires that ALL import files be placed in the Batch Directory in order to be imported.
You should probably save the files created by the web form into a secure directory on your web server and they should be copied into the Batch Directory after they are approved for submission. This will help to prevent unintended submissions.
If you used the defaults during the installation of AddWeb, the full path to the Batch directory will be
C:\Program Files\AddWeb6\Batch\
All files should have the .ini extension.